Re: does this sound like bipolarism?
Yes, please see a doctor, and if you do have bipolar, make sure to get medicine. And make sure to tell the doctor if you are still having mood swings like that when on the medication. My friend has bipolar, and she was put on the wrong medication. The next thing we knew, she was in the hospital from attempted suicide. She's on a different medicine now, and doing fine, but it's still best to check for bipolar and that you are on the correct medicine.
I hope you find out what's wrong!