Hard to say, between the shattered shoulder and smashed collar bone from a bike wreck,
Or
The grade 7(minimum)/10 neck pain 24/7 since I was 17,
Or diverticulitis.

The broken bones were painful but I knew they'd heal, though I still have splinters from my shoulder throughout all the tissue around it and they still sometimes cut into the muscles and even leave bruises. The neck I'm simply doomed forever because of two assaten bullies in highschool. Diverticulitis I wished would burst and kill me just to end the pain.
Above all, the worst pain was realizing that this person I married wasn't in love with me at all, but instead an abusive monster that tricked me. That pain I'm still not healed from and yet allow to continue sometimes. Destroying my trust and belief in her and myself hurt more than anything.