אני כל כך לחוצה לפני מבחן, שאני לא מצליחה לשתות קפה.

Because the adjective has to agree with the speaker’s gender.

• לחוץ = masculine singular
• לחוצה = feminine singular

So if a woman is speaking, she says:

• אני כל כך לחוצה...

If a man is speaking, he would say:

• אני כל כך לחוץ...

This kind of agreement is very common in Hebrew with adjectives.

כל כך means so or so much.

In this sentence:

• אני כל כך לחוצה = I am so stressed

It is a very common intensifier in Hebrew. You can use it with adjectives and sometimes with other descriptions:

• היא כל כך עייפה = She is so tired
• זה כל כך טוב = It’s so good

So the structure here is:

• כל כך + adjective
• so + adjective

Here ש means that.

The sentence uses the pattern:

• כל כך ... ש...
• so ... that ...

So:

• אני כל כך לחוצה ... שאני לא מצליחה לשתות קפה
• I am so stressed ... that I can’t manage to drink coffee

This is a very important Hebrew pattern:

• הוא כל כך עייף שהוא נרדם = He is so tired that he fell asleep

The ש introduces the result clause.

Hebrew often repeats the subject clearly, even when English might not.

So:

• שאני לא מצליחה = that I am not managing / that I can’t manage

Including אני sounds natural and clear. In some contexts, Hebrew can omit the pronoun, especially in informal speech, but here keeping אני is very normal.

So the repeated אני is not strange—it is standard Hebrew style.

Literally, מצליחה comes from the verb להצליח, which means to succeed or to manage.

So:

• אני לא מצליחה לשתות קפה literally means
• I am not succeeding in drinking coffee or more naturally:
• I can’t manage to drink coffee

This is a common Hebrew way to say that something is difficult for you to do, even if it is theoretically possible.

Compare:

• אני לא יכולה לשתות קפה = I can’t drink coffee / I’m unable to drink coffee
• אני לא מצליחה לשתות קפה = I can’t manage to drink coffee

The second one often suggests struggle, difficulty, or failure to do it.

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

• לא יכולה = cannot / am unable to
• לא מצליחה = am not managing to / can’t seem to

In this sentence, לא מצליחה fits well because it suggests that the stress is making it hard to do something she would normally be able to do.

So:

• אני לא יכולה לשתות קפה could sound like there is some direct inability or restriction.

But:

• אני לא מצליחה לשתות קפה suggests something like:
  • I try, but I can’t bring myself to do it
  • I just can’t manage it in this state

It is a bit more expressive.

Because מבחן here is being used in a more general or indefinite sense: before a test/an exam.

• לפני מבחן = before a test / before an exam
• לפני המבחן = before the test / before the exam

So the version without ה־ sounds more general, like talking about that kind of situation in general.

If the speaker means one specific exam, then לפני המבחן would also make sense.

It can mean either, depending on context.

• מבחן can be translated as test, exam, or sometimes quiz depending on the situation.

In this sentence, English could naturally use:

• before a test or
• before an exam

If the test is important, exam may sound more natural. If it is less formal, test may fit better.

Hebrew present tense is often used for:

• current states
• habitual situations
• general truths

So:

• אני כל כך לחוצה לפני מבחן means something like:
• I’m so stressed before a test or
• I get so stressed before a test

Depending on context, it can describe:

1. how the speaker feels right now before an exam, or
2. what usually happens to the speaker before exams.

Hebrew often lets context do that job rather than changing the verb form the way English sometimes does.

Usually, yes, in this kind of sentence.

The adjective לחוץ / לחוצה literally comes from the idea of being under pressure, and in everyday Hebrew it often means:

• stressed
• tense
• under pressure

So אני לחוצה is a very common way to say:

• I’m stressed
• I’m tense

It is one of the most natural words to use in this context.

The comma separates the main clause from the result clause:

• אני כל כך לחוצה לפני מבחן, שאני לא מצליחה לשתות קפה.

This matches the structure:

• so ... that ...

In Hebrew punctuation, this comma is common and helps readability. In less formal writing, people may sometimes leave it out, but using it here is completely normal.

Yes, but the meaning changes.

With כל כך:

• אני כל כך לחוצה... שאני לא מצליחה לשתות קפה
• I’m so stressed... that I can’t manage to drink coffee

Without כל כך:

• אני לחוצה לפני מבחן
• I’m stressed before a test

That is just a statement of stress. It does not automatically create the strong so ... that ... connection.
So כל כך is important if you want the meaning so stressed that...

A male speaker would say:

• אני כל כך לחוץ לפני מבחן, שאני לא מצליח לשתות קפה.

The changes are:

• לחוצה → לחוץ
• מצליחה → מצליח

Both the adjective and the present-tense verb form change to masculine singular.