First, I'm so sorry you were scared like that. You did need to be advised on things like side effects including suicidal ideation or plans but a gyno is ill equipped to do that sort of counseling which is why she should have never agreed to provide you with medication or act outside of the bounds of her specialty. Her fault---NOT yours.

Having said that, medications are a tricky thing. Those that work well for some will be disastrous for others even if two people have the same diagnosis.
Please get yourself to the appropriate health care provider. You may have to get a referral from your primary (depending upon insurance requirements) but stick with the process of getting yourself into capable and qualified hands.
It may turn out that BPD is not in fact the correct diagnosis for you only a qualified provider can make that decision.

Best of luck to you