A personality disorder has absolutely nothing to do with birth control. The way you try to trace cause-and-effect is really unusual and I would focus on seeing a good mental health profession to get the accurate treatment. I think you are right in that you are not getting an accurate treatment.

I took the mini pill. The Mini pill requires extreme discipline as you must take it exactly at the same hour daily. And still you can get breakthrough bleeding and still it is less effective for preventing pregnancy than the regular pill with estrogen. But you have been spot on, so you may be a good candidate for it. You will need to use condoms though still.

I would really talk to somebody who is professionally in the know before switching.