I have BPD and Bipolar, and also PTSD, in 2009 I was behaving exactly as you are now, and funnily enough I was also taking Fluoxetine, I gotta say that drug did me no good at all, but I didn't have my diagnosis back then, cut a long story short, I ended up severely losing the plot and had a massive breakdown! I spent a long time in hospital having the best therapy, 2 and a half years of it to be exact, thats what finally got my PD under control, it was like taking apart a jigsaw puzzle that had been put together wrong, then piecing back together again, I was a different person after therapy. Then theres the meds, I needed more than an antidepressant! I must have tried 5 before i found the correct antidepressant, so im now on venlafaxine, but i also take a mood stabiliser, and a small dose of antipsychotic for my anxiety. Its a mixed bag but so am I.
If you want my advice, make sure you get a correct diagnosis first and foremost! People worry about being labelled but I say it doesn't matter because along with the label comes the correct treatment! Just be proud of who you are, the label doesn't change that. And secondly, make sure you're getting the correct medication to treat the symptoms of your illness, you'll hear people say "you can't treat PD with medication", and in a way they're right, but you can treat the symptoms! Anxiety for a start!
Good luck, i hope this helps xx