I hate my irritability and my epic -don't want to get out of bed- depression

When I am in my irritable phase, I am a monster and haven't yet managed to control it really. I have to warn my partner about it when I feel it, on the fear that I will say something I will regret later on (he is still trying to understand what's going on with me).

The epic depression is something that cripples me, being a student who needs to travel to class (2 hour trip) everyday and be functional in a high stress environment. Because I have been going through this phase quite often, I am now even switching studies.

Unfortunate that I need to switch studies because of it, but I am noticing that I need to take care of myself first.