Después del examen, pasé del susto al alivio en cuanto vi mi nota.

Because del is the mandatory contraction of de + el.

• después de = after
• el examen = the exam
• So: después del examen = after the exam

In Spanish, when de is followed by the masculine singular article el, they normally contract to del.

Here pasé comes from pasar, but it does not mean I passed the exam.

In this sentence, pasar is used in the expression pasar de X a Y, which means:

• to go from X to Y
• to move/change from one state to another

So pasé del susto al alivio means I went from shock/scare to relief.

Also, pasé is in the preterite, so it describes a completed change at a specific moment in the past.

It literally means from the scare/shock to the relief.

A more natural English way to understand it is:

• I went from being scared/panicked to feeling relieved
• I went from shock to relief

Breakdown:

• del = de + el = from the
• susto = scare, fright, shock
• al = a + el = to the
• alivio = relief

So the structure is:

• pasar de + emotion/state + a + emotion/state

Because this sentence uses the pattern pasar de X a Y.

• de marks the starting point
• a marks the ending point

So:

• del susto = from the scare/shock
• al alivio = to relief

And just like de + el = del, Spanish also contracts a + el = al.

En cuanto means as soon as or the moment that.

So:

• en cuanto vi mi nota = as soon as I saw my grade

It introduces an action that happened immediately after another. It gives a strong sense of immediacy.

Compared with cuando:

• cuando vi mi nota = when I saw my grade
• en cuanto vi mi nota = as soon as I saw my grade

Both can work, but en cuanto sounds more immediate.

Because vi is the preterite of ver, and it fits a single completed event:

• vi mi nota = I saw my grade

The speaker is referring to one specific moment: the instant they saw the result.

If you used veía, it would suggest an ongoing or repeated action in the past, which does not fit as well here.

So:

• vi = I saw, one completed event
• veía = I was seeing / I used to see / I kept seeing

In this sentence, the immediate reaction depends on one definite moment, so vi is the natural choice.

No. In Spain, nota very commonly means grade, mark, or score, especially in school or university contexts.

So mi nota here means:

• my grade
• my exam mark
• my result

This is very common in Spain Spanish. A learner might expect note, but in this context that would be wrong.

Because the speaker is talking about the result of that one exam.

• el examen = the exam
• mi nota = my grade for that exam

If there were several results, you might see mis notas. But here there is just one exam and one resulting mark, so the singular is the natural choice.

Spanish often leaves out subject pronouns because the verb ending already tells you who the subject is.

• pasé = I went / I moved / I changed
• vi = I saw

So yo is unnecessary unless the speaker wants emphasis or contrast.

For example:

• Yo pasé del susto al alivio... would sound more emphatic, as if contrasting with someone else.

Without yo, the sentence sounds perfectly normal and natural.

Not exactly.

• susto = a scare, shock, fright; often a sudden emotional jolt
• miedo = fear; a more general or lasting feeling

In this sentence, susto works very well because the speaker is describing a sudden reaction related to the exam result.

So pasé del susto al alivio suggests something like:

• first a sudden panic or shock
• then relief

If you said del miedo al alivio, it would be understandable, but susto feels more vivid and immediate here.

It is natural and correct, but not always absolutely necessary.

Después del examen is an introductory time phrase. In Spanish, a comma after this kind of phrase is often used to mark a pause and make the sentence easier to read.

So both of these are possible:

• Después del examen, pasé del susto al alivio en cuanto vi mi nota.
• Después del examen pasé del susto al alivio en cuanto vi mi nota.

The version with the comma sounds slightly clearer and more carefully punctuated.

Yes, it sounds natural.

Several parts are especially common and natural in Spain:

• nota for grade/mark
• en cuanto for as soon as
• pasar de X a Y for changing from one state to another

So as a whole, the sentence is a good, natural example of everyday Spanish.