His scope was clear, his stomach looked really good. He did test positive for hind gut ulcers. I can remember the name of the stuff I got to treat them. 
I'm hoping that was our issue, it's still going to take me a long time to mentally get over it. 

any suggestions on hind gut preventative supplements to feed? 

Succeed Veterinary Formula

THE gut supplement. 

Keep us posted

MVP GastroPlex covers hindgut and so does succeed 

I just posted that my horse just broke in two on Sunday.  He does not favor the ground at this arena.  He did just get his pole injected but has ran fine one other time.  The pole injections were not a guarantee, kind of a new thing.  I wonder if it would have opposite effects?  I think i bruised a rib and am super sore.  The arena dirt scratched the heck out of me when i hit....odd.  I am sure i will be off for at least two weeks.  He was cleared of leg issues and is on Ulcer meds.

My wreck happened the first part of June and I still hurt some. It's frustrating, but I only stayed off a horse for about a week. I'm sure I should of waited. LOL

I've had a lameness and ulcer scope done on mine. He just finised 30 days of omeprazole and misoprostol.

I know not everyone is into it, but maybe have your horse read by an animal communicator. I can recommend an amazing one if you're interested. She does energy work too. 

I just had mine done because he still just didn't seem himself.

I would love to get your animal communicator's name, if you don't mind. 

My butth*le bucks with only me. I swear he hates me.

My horse bucked running home and I fell off and broke my back. That arena was like concrete! Luckily I had started wearing a helmet because my head bounced twice and I didn't even get a headache. It's been at least 5 years and I'm still not over it. (I'm probably a lot older than you though.) Keep riding your other horses at least until you know what what caused it. You don't want to be in my position where I'm riding around my arena and looking down and saying to myself, "That looks hard." It's so tricky to figure out if it's pain or he's testing you. Good luck!

I'm sorry for your wreck. The mental part of it is 100 times worse than the physical. 

I've made one run since I got bucked off, on my old faithful, he's 24. I turned first and still thought, is he going to buck. I've owned him 6 years and he's never bucked on the pattern, but the thought was still there. 

I have been riding the bucker, he's been really good not had a bobble, but it took me a while to relax and not go into panic mode when I stepped on him. 

CEP gut check is great!

Did a communicator 5 weeks ago. Nothing blaring came out of it. .   I did look at thre pictures. No video. He looks like he caught one front foot on the other. Like he legs slid ou too far in the turn then caught it with the other. I know he slipped so maybe that freaked him out.

A mare of mine did this years ago.   She was in a pasture with an apple tree that was dropping apples like crazy.  She broke in two when I asked for more speed and I ate the dirt.  Did this again about a week later.  Just didn't want to run which is not like her at all.  I noticed her by the apple tree a lot and moved her to a different pasture.  No problems ever since.  She's 21 now and still loves to run barrels.