During hypomania, early signs for me, are sleeping less, becoming consumed with certain activities. It starts out benign, but then crosses over into a lot of the behaviors you described.
For me, sometimes I am in an irritable state of hypomania, and other times, I am in an elated state or mixed. During one episode, I planned a trip to the Netherlands, although it is out of my budget and far away. I went as far as making plans with someone I had only known a few months. I put the trip on my credit card, and it blew up in my face when the person backed out of plans and messed with my finances. Promiscuity is a problem for me during hypomania. I am also more prone to drinking when hypomanic and other really impulsive behaviors. I pretty much meet criteria spot on when it comes to hypomanias and manias. Sometimes I get more social, when really, I am more of an introvert at heart.
Please don't feel bad posting this.

I understand though, I go through feelings of shame too. This is very common when it comes to hypomania. I hate dealing with this.