The thing with mood is you should keep a mood tracker. I have rapid cycling bipolar with mixed states. I have a very clear cut cycle and I cycle continuously with very rare times of "calm" or "normal" mood. I also have mixed states, which makes it really hard to always pinpoint what is going on with my mood exactly, since part of my cycle I'm manic and depressed at the same time.

The thing is, if I'm already in that muddled mixed area, even just getting close to it, my mood can switch on a dime depending on the triggers. I can be crying, then laughing, then yelling. It's all very complicated and dangerous for me.

Now, I'm not a pdoc either, but that's exactly why you should get evaluated. Because here we can only guess at what is going on. It could be PD or it could be something else. Borderline Personality Disorder tends to fluctuate mood wise more than traditional BP from a strict sense.

Also I have the Dx of schizoid PD. I don't know if it's correct, I don't fit into that box, either. I like working alone (not as a team), But I don't like total isolation.

So, anyway, it's all very complex and difficult to deal with by yourself.

Good luck, I hope things work out for you.