If she's telling you that she doesn't know if she's about to be manic or depressed, that makes me wonder if she's mixed, actually. I have a lot of mixed episodes and it really feels like you're on the edge of a complete breakdown. It is a horrible, horrible feeling.

Mixed states can be rather dangerous if you're not careful, because it's easy to push you over the edge. And, yes, in my experience I am super sensitive to everything and cry or get angry very easily.

I would say sleeping a lot is a red flag for depression in a lot of cases, but she could just also be genuinly tired.

I would say that if it isn't clearing up and she's not doing well, you should get her in to see her doctor or her therapist ASAP. Just to be safe and figure out what's going on. Be there for her, listen to what she's telling you, and let her know you're there and will help her through it. Having support is a huge, huge important thing. And know if she explodes at you right now, she's kind of caught in a tornado in her mind and having a hard time. I know it's hard, so take care of yourself, too.