I think I might have this. I went through a really awful time last year where I had terrible obsessions which lasted about 3 months. I won't specify the obsessions because they actually disgust me. I told my T about it, but she either doesn't know about it/didn't want to diagnose me/didn't think i had it.
in any case, it can be really bad. Mine got so bad that I considered how I might end my life if my fears about myself were confirmed. Thank god that passed, and not entirly sure how it did. But I'm still terrified it could come back.
Wish i could give more insight, but I'm as stuck as you are right now. Nice to meet someone who gets it though

take care