Guilt for things you cant control?

Needing advice on how to be less harsh on myself for things

So I have a medical condition that causes me a lot of pain and bleeding during sex. I’ve had it my whole life, and have gone to many doctors. I’ve been in physical therapy for the pain and it has helped significantly (thankfully) so now it’s very rare that I have pain during sex unless I’m anxious. The bleeding, however, is still pretty prominent. I’m not concerned about it like I used to be because my doctors have told me it’s pretty normal for my condition and it could just be the way the person I’m with is hitting my cervix.

I’ve been seeing a guy for the past few months who knows about this and is very kind and aware when it comes to the situation. However I feel SO guilty when it happens. There is nothing more irritating than when I get up and I’ve bled everywhere. He’s told me multiple times he doesn’t care, and he doesn’t ever want to put a towel down so I don’t know why I feel so bad after?? I obviously can’t control it and I know that, which is very annoying to know your body is working against you, but I don’t know why I’m feeling so guilty after it happens.

I don’t know if anyone else has these experiences or any advice but I wanted to see if I was the only one.