I think I'm bipolar...

Last year my long term bf broke up with me and I was a wreck an insane wreck. I dug myself into work as cheerful as can be and I really was, my coworkers gave me shoulders to cry on, experiences to learn from, & filled me with laughter but then I would come home and run to our best friends house to cry on the couch like a nervous wreck sometimes even telling them I wish I never got better from childhood cancer so I would never have grown up to have him hurt me (I had cancer from 12-18) we made up and have been together for a year with some ups and downs but my mother got into a car accident on the 13th of this month, and the driver told her it was his fault but he wasn't going to file under the insurance for whatever reason and they left it at that, although she called the cops and asked if anyone needed an ambulance everything was fine and they parted ways. Then just yesterday my mother calls me in shambles that she has two points on her lisence because of a hit and run. The guy got a lawyer and said he, his wife and young daughter were injured and since my mom didn't file anything her insurance company took the blame; now my mother has a reckless driver record and I know it wasn't her fault he abruptly stopped in a right turn lane right outside my house, since I'm the one who deals with my entire family's affairs everything fell on me to take care of.
When I called my bf about it, he said I told you the guy would call (he knew about the incident when it happened) and I just started screaming at him just went into this insane rage I couldn't control just yelling and crying a tantrum like cry I couldn't stop. He called me down we talked about how that wasn't ok for me to do, but I couldn't help it I lost all control. 
I've thought I was bipolar before but didn't say anything because I was training in a police cadet program at the time and was very good at my job; I had a prominent future in it and thought that's what I was planning to do but now I'm just as scared and don't know if something is wrong with me or how to get it checked out. 
I have a midterm in two hours and haven't been able to study because I'm still anxious about this and it has been two days already