Me he equivocado. ¿Estás enfadado conmigo? Lo hablamos con calma.

Because equivocarse is the usual verb for to be mistaken / to make a mistake in Spanish, and it is used as a pronominal verb.

So the full form is:

• equivocarse = to be mistaken / to make a mistake

That is why you need the reflexive pronoun:

• me he equivocado = I’ve made a mistake / I was wrong
• te has equivocado = you’ve made a mistake
• se ha equivocado = he/she has made a mistake

Without me, he equivocado would sound incomplete or wrong in this meaning.

It is the present perfect tense:

• he = I have (from haber)
• equivocado = past participle of equivocar

So:

• me he equivocado = I have made a mistake

In Spain, the present perfect is very common for recent actions or situations still connected to the present. In many Latin American varieties, people might more often use the simple past in similar contexts:

• Spain: Me he equivocado
• Common Latin American alternative: Me equivoqué

Both are correct, but the version in your sentence sounds especially natural in Spain.

With a conjugated verb form, object/reflexive pronouns usually go before the verb.

So in compound tenses like the present perfect, the pronoun goes before the auxiliary haber:

• me he equivocado
• te has equivocado
• se ha equivocado

You do not say he me equivocado.

A useful rule:

• with a conjugated verb, pronouns usually go before it
• with an infinitive or gerund, they can attach to the end:
  • voy a equivocarme
  • está equivocándose

Very often, yes, but it can also mean to be wrong or to be mistaken, depending on context.

Examples:

• Me he equivocado. = I made a mistake / I was wrong.
• Te equivocas. = You’re mistaken / You’re wrong.
• Nos equivocamos de calle. = We took the wrong street / We got the street wrong.

So the idea is generally being in error, whether in speech, judgment, or action.

Because here enfadado describes a temporary emotional state, not a permanent characteristic.

• estar enfadado = to be angry / upset
• ser enfadado = to be an angry-tempered person by nature

So:

• ¿Estás enfadado conmigo? = Are you angry with me?
• Es muy enfadado. = He’s an irritable/short-tempered person.

In this sentence, the speaker is asking about someone’s current feeling, so estar is the correct choice.

Both can mean angry or upset, but enfadado is especially common in Spain, while enojado is more common in many parts of Latin America.

Since this sentence is Spanish from Spain, enfadado is the most natural choice.

Also, in everyday Spanish from Spain, enfadado can range from:

• mildly upset
• annoyed
• angry

So the exact strength depends on context and tone.

After the preposition con, the pronouns mí and ti change form:

• conmigo = with me
• contigo = with you

So you say:

• ¿Estás enfadado conmigo?
• Ven conmigo.
• Voy contigo.

Not:

• con me
• con ti

For other pronouns, the normal prepositional forms are used:

• con él
• con ella
• con nosotros
• con vosotros

Here lo is a direct object pronoun meaning something like it or the matter.

• Lo hablamos = We’ll talk about it / We’ll talk it through

Spanish often uses a direct object pronoun where English prefers a longer phrase.

Compare:

• Hablamos del problema. = We talk about the problem.
• Lo hablamos. = We talk it through / We discuss it.

In this sentence, lo refers to the situation, issue, or mistake already understood from context.

This is very natural Spanish. It sounds compact and conversational.

Because Spanish often uses the present tense to talk about the near future, especially for plans, suggestions, or something the speaker proposes right now.

So:

• Lo hablamos con calma. literally looks like We talk about it calmly
• but in context it means We’ll talk about it calmly or Let’s talk about it calmly

This use of the present is very common in everyday speech.

Similar examples:

• Luego te llamo. = I’ll call you later.
• Mañana lo vemos. = We’ll see it tomorrow / We’ll deal with it tomorrow.

So the present here makes the sentence sound natural and immediate, not ungrammatical.

Yes. Depending on tone and context, it can sound like:

• We’ll talk about it calmly
• Let’s talk about it calmly
• We can talk it through calmly

Spanish often leaves this slightly open, and the exact force comes from the situation and intonation.

If the speaker is reassuring someone, it may feel close to:

• Let’s discuss it calmly

If they are postponing the conversation a little, it may feel more like:

• We’ll talk about it calmly

So the grammar is the same, but the nuance can shift.

Con calma means calmly, without rushing, or in a calm way.

It suggests a peaceful, measured conversation rather than an emotional argument.

So Lo hablamos con calma implies something like:

• we’ll discuss it without getting worked up
• we’ll sort it out calmly
• let’s talk it through in a calm way

It is a very common expression in Spanish.

Other examples:

• Hazlo con calma. = Do it calmly / Take your time with it.
• Vamos con calma. = Let’s go calmly / Let’s take it easy.

Spanish uses two question marks in writing:

• ¿ at the beginning
• ? at the end

So:

• ¿Estás enfadado conmigo?

This helps the reader know from the start that the sentence is a question.

The same idea applies to exclamations:

• ¡Qué bien!

This is standard punctuation in Spanish, not optional in careful writing.

Yes for Me he equivocado: that form does not change for gender.

But enfadado must agree with the person who is angry.

So if you are asking a man:

• ¿Estás enfadado conmigo?

If you are asking a woman:

• ¿Estás enfadada conmigo?

Agreement matters with adjectives in Spanish, including past-participle-like adjectives used with estar.

Yes, very natural.

It sounds like someone saying:

• I was wrong / I made a mistake.
• Are you angry with me?
• We’ll talk it through calmly.

What makes it sound especially natural for Spain includes:

• Me he equivocado with the present perfect
• enfadado rather than enojado
• the compact phrasing Lo hablamos con calma

It is conversational, idiomatic, and emotionally realistic.