Hi! One of the very first topics ("Attention Newbies") on this board kind of lists the various symptoms of Bipolar Disorder. Not everyone has all of them all the time but everyone has some sort of regular cycle between the highs and the lows.
You should really check them out. Also, in case you didn't know, there is a board here for Self-Injury (cutting) that may help in that area since it's not the average bipolar symptom.
Welcome aboard, we've had people come and stay here even when they found out they weren't Bipolar - so keep that in mind!