I'm having similar problems right now; I was hypomanic for the past 3-4 days (with the high peaking last night, causing me to stay up to 5 AM) but this afternoon, I crashed out of nowhere. Now, I'm mostly low but I have random spikes of energy and elation that last for just minutes, or even seconds. I was recently diagnosed with BP II.

I don't have any advice, except to be gentle with yourself. This disorder plays with our mood and attention so much that it is easy to start believing that we'll never amount to anything. Depression will interrupt all of our plans, and everything we seem to be passionate about was really borne out of (hypo)mania.

These statements are lies. We are capable of much, and while our lives do not follow the same patterns as those of "healthy" individuals, we have certain advantages that arise from having to deal with our condition.

I wish I could help more. Stay strong!