Sounds like performance anxiety. I experienced this shortly after taking fin back in 07. The residual effects after stopping was that I developed performance anxiety, which is fear of ED happening again. If you can get an erection normally, it’s not your body it’s your mind.
You know when its your body. When I got the side effects from fin I got ED with one girl. Afterwards I tried mastrubating watching pornography, nothing worked. Truly horrifying. 9 months after stopping fin, it happened again with another girl, but this time it happened as soon as I thought about it. Afterwards, I watched porn and I was fine. Moral of the story, the mind is powerful. Try to talk to a therapist to find the root cause of your anxiety.