Cannabis was the true lifesaver for me with my OCD. I once felt guilty for months because my magical thinking connected dots between me not going to karaoke and David Bowie dying.
I tried a plethora of psych meds. The worst ended catastrophically. The best could, at most, sedate me so heavily I couldn't lay awake at night thinking about how kids were dying in Africa because I didn't put a coin in the little UNICEF donation box or whatever the current angst is. I still stepped over the same number of cracks with each foot, lest I somehow superstitiously kill my mom (my brain took the "step on a crack, break your mother's back" thing a bit too far,) and couldn't be near my nephews without intrusive thoughts about pushing them into traffic.
But then I got high.
Seriously, in the beginning, I would take a couple hits off a bowl, then I would go stare at my ceiling fan and my brain would gently dismantle the thought processes locking me into meaningless and anxiety-inducing cycles. Heck, I was able to wean myself off my psych meds and went a few years entirely managing my OCD as well as a couple chronic physical health issues with weed, at least till COVID threw a wrench into things.
Too much made me anxious/paranoid at first. But slowly easing in, with indica and high CBD strains, I eventually found it to be a highly effective medicine for me, and I'd say even now it gave me an 80% remission of OCD symptoms. I can have an intrusive thought come in and then sorta laugh it off and it goes right away. Closest I ever got with psych pharms was having the intrusive thoughts and feeling numb to the pain they caused, but still obsessing over them for a little bit.