Real event/ guilt OCD

So I have been struggling with the same theme of ocd for 4 months now. My ocd centers around past events/false memories that ocd skews to make seem bad or it twists my thoughts on what my intentions were. this is related to cheating or being weird while I have been in my amazing relationship. I have never cheated on my partner and never will and I believe it is wrong. But my ocd is telling me other wise. I love my partner so very much and I would never want to hurt him but my brain is getting to me. I was getting better. I was trying “maybe I did, maybe I didn’t”, I have been back on meds and in therapy and I stopped confessing random interactions from years/months ago about 1.5 weeks ago and it really helped. But now I woke up this morning and feel the pit in my stomach again. I feel extra critical and like why would you do this? What does this say about you? What was your intention with this? And I’m just stuck mentally reviewing and ruminating on everything you could imagine. I know my personality and I know in the moment maybe I did find them attractive but mainly I was just being nice or funny or even just a good friend, but looking back now I’m like “was it flirting?” “Why did I still snap this person” “why would I even talk to them” and stuff like that. I feel this intense sense of guilt. I have told my partner everything that I keep getting stuck on and he didn’t care, he said he understands or “that’s a little weird but it’s okay” and hasn’t missed a beat. He said eveything I’ve told him is normal and I’ve heard that from my friends too. I just really need help. I don’t know what to do anymore. I am so disappointed because I thought I was gonna be done with this, so why am I still so worried and caught up in this.

I experience crippling, debilitating false memory OCD. It started with a “what if” thought 6 days ago and has spiraled into a never ending loop. My mind is telling me that “maybe you did this terrible, awful, unforgivable thing years ago and you don’t remember it and it’s only a matter of time before it catches up to you and your life is over” I’m really needing some coping mechanisms and support. I’m really scared and my body is exhausted. I just want it to stop. It is full panic attack all day, every day. Please if anyone can relate or help me.

Currently feeling extremely shameful for something I did in the past. Any advice? I've had periods of coming to terms with it and understanding that it was just a mistake, as no one got hurt, but now it's resurfacing again.