Fixating on borderline personality disorder this time... ugh! I can truly convince myef of anything

I’ve gone through so many themes and seen the pattern so many times that I’m getting to a point where, new themes come in and I automatically identify my compulsions and the potential ones and then choose to not engage. OCD now is like a thorn in my side rather than a boulder suffocating me. But still that annoying little thorn that will always be there dispositionally

I bought some books on OCD because I like education and would like to know a little more behind why I feel or think this way. I opened up to my mom about this and she keeps saying I’m obsessed with having OCD, she doesn’t actually believe I have it, and that I forced myself to have those thoughts. She then told me she’s going to ask her mental health provider (she’s a nurse) if you can give yourself a mental illness because she said there’s no way someone could spiral out of control within a few days the way I did.

I know the solution is to always say “yeah that could be true, but I am choosing to live my life anyway.” However, I feel like my biggest issue is my brain always assuming that it is immediately true when I do that. Like if I say “maybe I’m attracted to teenagers, it’s possible,” then my brain INSTANTLY starts rationalizing that thought and defending it and being like “oh okay so you think this now and it makes sense because xyz, and now that’s who you are and your real desire is now and always will be teenagers.” I feel really alone in this area of feeling like my brain “accepting the thoughts” means my brain immediately accepts them as true. I obviously don’t want to think they’re true but I feel so stuck now.