I’m very sorry about your injury, it’s amazing how quickly things can go wrong. I can’t say too much about coping with pain, except keep up with the PT- it will really help (I wish I’d had gotten some earlier…) but I can give thoughts on the fear.
I was in a wreck 12yrs ago when I got pinned by my horse between his chest and a telephone post sized hitching rail. I had to have emergency surgery to piece me back together, 2 weeks in ICU etc. It was completely a freak accident.
I had someone lease my horse for the summer while I recovered. I was only allowed at barn with someone else there while I brushed, fed treats what not. I was very lucky that a friend let me play with her miniature horse for the summer. It let me build up confidence with no threat. It took a long time to even think of tying a horse up! I didn’t find getting back on horse hard but the thought of tying them up frightened me. Is it possible you could borrow time with a pony?
It still sometimes catches me out the fear- I’m pretty good at hiding it. I had incident probably 3 yrs after wreck that horse pulled back- literally ran out of barn and stood in parking lot sobbing. (Of course new barn… Had to explain later!) and I don’t like loading new horses in trailers, or tying up for clipping etc. I can’t even tie my own horse up at hitching rail without a little worry and he’s never given me an issue. At least now if a horse pulls back I only run about 3-4 stall distances away! I figure self preservation is not a bad thing, keeps you on your toes and I can promise you will get very good at seeing the “what ifs” early. Is your fear going to go away completely? Doubt it, but you can learn to manage and control it. I don’t think of the fear as a bad thing anymore, it’s kept me safe dealing with young/green horses. You will recover and find your way to working with your horses- you may have to modify things to help regAin confidence (smaller horse/pony, can your horse go so where where he has buddies that won’t interfere with your turn in/out?, having someone come with you for that?)
I hope you heAl well and find a way to feel comfortable again with your horse. Take your time and it will come!