Good day everybody
My girlfriend has university exams right now and that seems to stress her to the point where our relationship might be affected. She's feeling down, is right now slightly more irritable and complains about me (this time not so much in a joking manner).
My question is how do i interpret this and how can i manage the relationship better during this kind of times?

She reeks of crazy, dude.

I don't see anything here which suggests that she is crazy.

This can happen to everybody. Ask her what's the matter. If she is being a real bitch then point it out. Tell her that she is not fun and you understand that she is under pressure but she shouldn't take it out on you. If she cares about then she will apologize. If not, well...

Agree with AFc... Also take a step back and give her space during these times.

Stop personalizing her behavior. See it instead as a tragic expression of an unmet need. Try and figure out what that need is, it may simply be support and you're unable to provide that to her SPAM because you're too busy personalizing what she says and instead exacerbating her frustrations. So, yeah, in some sense you can make yourself the issue by taking on her stuff rather than helping her meet her needs (and yours at the same time).

Perhaps you guys are commenting on the EDITED version of the OP's post...

The original detailed a fight, breakup, an 'I can't live without you' text an hour later... and consistently weird behavior.

Jeez why do guys delete shit? I don't understand it...it seems pussy ish

Girls are always weird when their stress or something. there moody and sometimes misunderstood.
If you want your relationship with her. keep it strong, just let her calm her mind in a moment or period of time like let her study and do whatever she likes just listen to her.
if you really love the girl and want to save your relationship then learn to understand her.

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This changes the whole topic considerably. OP, we need the full story to give relevant advice.

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I am a med student and i get stressed a lot during exams so here are some tips that you can use with you gf.

When i am stressed i want to be left alone, i will contact you if i want to talk to you and do not lecture me. I hate to be texted when i study and even more when my gf texts me :*. When i'm studying i need to be left alone to be able to concentrate!
I need to be supported.
I do not need any more drama, i need for her to understand me.
After a hard exam i like to talk a party a little after only if i feel i did ok. The moment i feel i fucked up my exam i want to be left alone or to have someone next to me just to approve and nothing more. I need to hear what i want to hear.
The list can go on and on and on.

The main idea is to let her be the way she is, do not give her more crap to deal with. If something is wrong you can talk to her after a week she finished her exams when she is relaxed and not stressed.