I'm wondering why your pdoc hasn't considered a dual dx... Its not uncommon to have both. I do anyway
To answer your question, idk if you should try meds, maybe the reason therapy isn't very effective is because you're not dealing with everything, just the bpd? Idk just speculation on my part...
Meds can be helpful to alot of people, for me it did help during a crisis, but I can't fathom using them as daily management.
I really think you should speak to your pdoc about a dual dx, if you do have both disorders, it doesn't help to only address the one, no matter how many symptoms overlap. You need different coping skills as they are quite different at the core no matter how alike they look on the surface.
Sorry if I was unhelpful, weekends are hell