To me, and please, I am not an expert, what you have described sounds more like borderline. Mood shifts are typically much shorter with borderline, and the anger you described also fits in with borderline. As does the negative self image.

I suggest you do research on both and see if one or the other describes you more. Also, it is possible to have both. There's a few people here that do.

But don't despair. Both are treatable. The standard for borderline is now dbt, which can also help to a certain extent with bipolar.