my ex FP learned all she could about BPD and ended up manipulating me around it. Invalidating how I feel by saying "it's just your BPD/in your head" etc. while quoting psychologists. I really thought she meant well at first but it was clear that she tried to control me with my own BPD.

When I cut her off she was still insisting that this is my BPD acting up and that I will be back. I wasn't. She has been stalking me since,  even visited me at home once. 

I've grown so paranoid and distrustful. Even more so because I'm pretty sure my ex FP is an undiagnosed narcissist. 

I'm just scared and on  medication to keep myself at bay.