I know you said you feel like you can't tell anyone, but you were brave enough to be honest here. That is a good first step. I'm not an expert, but it sounds like maybe you are experiencing hypomania. You mentioned several factors that fit with that.

It might be time to reach out to your doctor to see about getting back on meds. Hypomania can morph into full blown mania and even psychosis quickly. It may feel good now, but so many of us have major regrets from the things we did while manic. I'd give anything to go back in time and do something about my episode when it was ramping up and before it went too far. Please be careful.