Hi K,
I'll go 180 from what others have said above... the nerves in your bowels are part of the enteric nervous system, which has about 5 times the number of neurons in your spinal cord (meaning it's friggin' big!). It's not a well-understood system, but there are definitely nerves in your bowels. Ask anyone who's ever had a bowel obstruction if it hurts when your bowels are expanded to almost popping. I've been using Diphen Atropine as a motility drug for about 5 years now, and being a narcotic, it essentially numbs the bowel (and my stoma) to some extent. When I started weaning down my dosage, my stoma would start to hurt after about 8 hours, which is how long the drug lasts for motility. And it would continue to hurt like heck until I took another dose. Over time, it got used to the routine, but there was pain involved. I've also banged my stoma into things and have been kicked there by my goat (who just wasn't really keen on being milked that day)... and it hurts! And it hurts for days.
You've most likely bruised your stoma, but not done any permanent damage. If you had done permanent damage, I doubt you'd be able to sit long enough to type your post. I'm not sure how best to treat it, other than getting your mind off it and letting your body recover. I'm sure ice wouldn't hurt, but avoid heat, as that tends to increase blood flow in the area... which you don't need right now. I'm still a bit puzzled by how you play with your cat. If I did a belly flop right in front of my cat, I don't think she'd still be in the room when I realized what I just did. Is there any video of this... we could all use a little entertainment these days! Seriously, if it's not getting better in a few days, it might be time for a video appointment with your doc... who'd also probably like to see the video!
;0)
Bob