Anal training

To keep it short, my butthole is super small and I can barely fit anything other than a finger. Me and my partner tried anal and I had to go to the hospital a few days later because of the pain. It’s been more than three weeks and it still hurts as hell to poop. And talking about 💩…my butt often bleeds when I poop, so I always have to be careful about my diet.

The thing is I’m incredibly into the BDSM space and not being able to do anal pisses me off. I’ve even considered getting a LIS surgery as a last resource.

For people with very small buttholes, were you able to properly do anal training and reach a point where you were actually comfortable? Can this be solved with training only?