Sigo sin conseguir una cita en la consulta, así que volveré a llamar mañana.

Both are possible, but they are not exactly the same.

Seguir + sin + infinitive means to continue not doing / to still not manage to do something. It emphasizes that the situation has been going on for some time.

So sigo sin conseguir una cita suggests:

• I have tried before
• I still have not succeeded
• the problem is ongoing

By contrast, todavía no consigo una cita simply means I still can’t get an appointment. It is also natural, but sigo sin conseguir sounds a bit more focused on the continuing frustration.

Because seguir is irregular.

In the yo form of the present tense, seguir becomes sigo:

• yo sigo
• tú sigues
• él/ella sigue

This is a common pattern in Spanish for some verbs ending in -guir:

• seguir → sigo
• distinguir → distingo

The u disappears in the yo form so that the g keeps a hard sound.

Sin means without, and conseguir means to get, to obtain, or to manage to get.

So sigo sin conseguir literally means:

• I continue without getting
• more naturally: I still can’t get / I still haven’t managed to get

The key idea is lack of success after trying.

This structure is very common:

• Sigo sin entenderlo = I still don’t understand it
• Sigue sin llegar = He/She still hasn’t arrived

Yes, very natural.

In Spain, conseguir una cita is a common way to say to get an appointment. It often implies that getting the appointment is not easy.

Other possible verbs are:

• obtener una cita — correct, but more formal
• pedir una cita — to request an appointment
• reservar una cita — to book an appointment
• lograr una cita — possible, but less common in everyday speech

So conseguir works well because it suggests effort and success after trying.

No. Cita can mean different kinds of appointment or date, depending on context.

Here, because of en la consulta, it clearly means a medical appointment or an appointment at a clinic/doctor’s office.

Common uses:

• una cita médica = a medical appointment
• tengo cita con el dentista = I have a dentist appointment
• una cita romántica = a date

So cita is much broader than just a romantic date.

In this context, la consulta usually means the doctor’s office, the clinic, or the medical practice/consultation service.

In Spain, consulta is often used for the place or service where a doctor sees patients:

• llamar a la consulta = to call the doctor’s office / clinic
• tener cita en la consulta = to have an appointment at the clinic

It does not mean consultation in the abstract English sense here. It refers more to the medical setting.

Depending on context, a natural English equivalent could be:

• the doctor’s office
• the clinic
• the surgery in British English

Because the sentence is talking about the location or setting of the appointment, not movement toward it.

• una cita en la consulta = an appointment at the clinic/office
• voy a la consulta = I’m going to the clinic/office

So:

• en = in / at
• a = to

Here, the appointment takes place at the clinic, so en is the natural preposition.

Because mañana here is being used as an adverb meaning tomorrow.

When mañana means tomorrow, it usually appears without an article:

• Te llamo mañana = I’ll call you tomorrow
• Volveré mañana = I’ll come back tomorrow

But when mañana means morning, it usually takes an article or another determiner:

• la mañana = the morning
• esta mañana = this morning
• por la mañana = in the morning

So in volveré a llamar mañana, it clearly means tomorrow.

Así que means so, therefore, or so then. It connects the first idea to the result or next step.

In this sentence:

• I still can’t get an appointment, so I’ll call again tomorrow.

Comparison:

• así que = so / therefore; very common and natural for linking cause and result
• entonces = then / so; often a little more conversational and can also mark sequence
• por eso = for that reason / that’s why; slightly more explicit

Examples:

• No contestan, así que llamaré más tarde.
• No contestan, entonces llamaré más tarde.
• No contestan; por eso llamaré más tarde.

All three can work in many contexts, but así que is especially natural here.

Volver a + infinitive means to do something again.

So:

• volver a llamar = to call again
• volver a intentarlo = to try again
• volver a empezar = to start again

In the sentence:

• volveré a llamar mañana = I’ll call again tomorrow

This is a very common Spanish structure. It is often more natural than trying to translate again word-for-word.

Both are correct.

• volveré a llamar mañana = I’ll call again tomorrow
• voy a volver a llamar mañana = I’m going to call again tomorrow

The difference is small:

• the simple future (volveré) can sound a little more neutral, concise, or formal
• ir a + infinitive (voy a volver a llamar) can sound a little more immediate or conversational

In everyday Spanish, especially spoken Spanish, voy a + infinitive is very common. But volveré is also completely natural.

Because the noun una cita is already stated right after the verb, so no pronoun is needed.

• sigo sin conseguir una cita = I still can’t get an appointment

If the appointment had already been mentioned earlier, then a pronoun would be possible:

• La sigo sin conseguir = I still can’t get it

Spanish often uses a pronoun only when the object is already known from context. Since una cita appears explicitly in the sentence, adding la would be unnecessary.

Yes, it is normal and helpful.

The comma separates:

1. the situation: Sigo sin conseguir una cita en la consulta
2. the consequence: así que volveré a llamar mañana

In short, it works like:

• I still can’t get an appointment at the clinic, so I’ll call again tomorrow.

In informal writing, punctuation can vary a bit, but the comma here is standard and clear.