Jess,
Ok well that's good your keeping her updated. And the pdoc does need to be informed.

Yes all your exams count, lots of stress especially when you trying to deal with all this other stuff at the same time. The rapid mood changes are not normal.
As far as your cpn goes, maybe it's not that she doesn't care, but that she is trusting you because you are not acting on it now and are keeping her aware and informed which is exactly what you should be doing . It's still concerning tho.

Maybe you could make a list of all your concerns for your pdoc tomorrow, so you don't forget anything. And it sounds like the suicidal thoughts are concerning to you as they probably should be. That alone makes it important to be discussing it.

Good luck at your app, let us know how it goes tomorrow.