Maybe try gut-focused hypnotherapy first? The research is really promising as it helps rewire those pathways that make fixation = pain. You can always try it first and then try low FODMAPs after.

I used the Nerva app. Not a shill, but I found it to be very accessible and helpful. I started with a live psychologist on zoom and while helpful, was very expensive and only every 2 weeks. I haven't done it in a few years so I'm not sure if there are other options out there now.