Effexor again

Hello everyone! I’ve been on Effexor for like 2/3 years. In my life I have/had obsessive thoughts with rumination and at the end of 2025, my thoughts were very Unbearable, so much so that it had compromised my physical and mental well-being. I spent a lot of time ruminating and questioning past events. My psychiatrist decided to prescribe me fluvoxamine, which is a first-line treatment for OCD, but it didn't work. My thoughts calmed down a bit, but I slept all day and lost my appetite. Now I'm gradually tapering off the fluvoxamine and going back to Effexor, but I'm really afraid of going back to square one and falling into an obsessive spiral. I don't have physical compulsions, and my psychiatrist told me it's possible to have obsessive thoughts. I'm afraid of having obsessive spirals about my memories, my morality, again...

Does anyone have any advice? Has Effexor worked for someone with OCD? Should I start psychotherapy for the obsessive thoughts?thank you