Hi sweetie, welcome!! I was dx 15 years ago and what holmes said is excellent.......my impulsivity also included promiscuity, drugs and crime......don't know if thats also what you are battling with.........
The self harm is tricky, addictive, self-medicating and instantly relieving.......to be honest I had to learn to control my anger before I could stop cutting. I was like a binge cutter........wouldn't do it very often but when I did I would often go a little too far and i would end up in hospital. I was not suicidal just insanely angry.
Therapy, hospitalisation and anti-psychotics got me through the worst times of Borderline. And I would suggest a good T and psychiatrist to help you if you can.
Mind you, there was never any support for BPD outside of the T office when I was dx.......no one knew of it and no one talked about it.........I am amazed 15 years on how much support is out there now and that some of the stigma of this disorder has been removed.
I am sorry if I have not been able to help.......most of my experience comes from an extreme perspective........you sound proactive though and you have initiative.........
Good luck and be safe.........

