i dont think im bipolar but i have moments were i get more upset than i should. what should i do?

hi there- many times in the past my mom or family has called me bipolar but i alawys denied it like there is no way. But after last night i have to find out if what i was feeling is from the disorder or from something eles. After i was in a perfectly normal mood i called my grandma 3hrs away (i just recently moved away from my family 3weeks ago) and then i got upset because i miss my family. i layed there for awhile then started to get a migraine, which i get more often then id like. As i was laying there every thing started to piss me off, even the most simplest things. Me and my boyfriend went to the store and got some candy and my mood got better. Soon after my migraine was getting more intense so i layed down hoping to sleep it off. i woke up about an hour later with one of the worst headaces in a long time so i got out my medicine (pissed to hell) and took 3 ecxedrine. I woke my boyfriend up because i was about to EXPLODE with anger and i was holding it back so much cuz we live in his parents house at the time and i didnt want to be disrespectful and brake something, i wanted to hurt something so bad and i ended up punching myself in the head repeadidly and instintly felt better. me and my bf then talked and he calmed me down a little by having me tell him a story as we lay trying to go back to sleep. i woke up in a very very good mood and i dont know what could trigger my anger and make me want to hurt myself alot. thank you for listening