Struggling with a possible BPD diagnosis

I think I might have quiet BPD. I meet all the criteria for diagnosis, literally every single one. but I don't know how to go about getting diagnosed bc every time I try to talk to my mom about something involving a mental health diagnosis she says I'm making it up I don't have that my case isn't that serious and all that jazz. and I have a therapist but I don't think I've gone into full depth of what's going on in my head and that's why she doesn't know this. should I ask her about it or just leave it alone? I can't tell if maybe my mom is right or if I should bring it up...