Trauma and OCD is an extremely difficult mix..
before trying ANY type of psychadelic- do you have or does BPD or schizophrenia run in your family? If so- do not attempt psychedelics without a medical professional please.
That said, I have adhd with an underlying OCD component and PTSD. Erasing trauma from your brain is unrealistic, and goes against your natural defense mechanism, even if you don't consciously remember a traumatic event your brain stores the danger component and subconsciously reacts to it, trauma literally changes your brain. It's best to focus on identifying things and working through them. If it's an option for you to try psychedelic treatment, micro dosing can be helpful or a controlled trip. Also, I'd recommend focusing on your compulsions and controlling intrusive thinking first.
Do not underestimate your OCD! Your intrusive thoughts are not the same as someone who does not have OCD. 6 years later I am still compelled to make sure my door and windows are locked 5 times every single night. Even if I can get myself to knock out without doing it I will wake in the middle of the night panicked to do it. Logically I know it's so irrelevant but the ocd component tells me I have to. I'm not triggered, I'm not thinking about the traumatic events that got me there, it's the compulsion which is so much harder to break than identifying and coping with triggers from trauma, for me anyway.