I'm glad you are OK. I had a guide friend who said there are two groups of fishermen: those who admit having fallen out of a boat, and those who don't!
I've only fallen once - from the front deck of a 20' bass boat - but it was a doozy. The "stump" we hit was a branch from a 6 inch diameter trunk rotted off beneath the surface. I did an end over end as I entered and basically ended up "sitting" on that trunk with my left buttock, paralyzing my left leg for a period of time. I needed help getting back into the boat, the fishing trip was ended, and I was immobilized for several days. It took over six weeks for the bruising to dissipate. It's no fun at all!