Do some ground work and join up (run him around until he puts the inside on you, and his head goes down and he licks his lips, turn your back and if he walks up to you then he trusts you and you 2 can do the almighty!!!). It does work, I had an unbroken 4 year, and now he will risk his life for me.
Start back slow. Do small lunging sessions and gradually make them longer. Then start with short rides and gradually make those more difficult/complex. I haven't had this problem in a while because none of the horses I've trained have had this issue :)
He still might be sore I would do a nice lunging work out before I ride (before I ride I lung to see how he's walking and how he is feeling ) do you ride with any splint boots or any new tack that might be bothering him? But defiantly try lunging him first or any work out that might strech home out or do some stretches with the horse move the neck side to side and pick up the legs and pull them out and put them down. Hope this helps
Yes I agree with @hoovesoffreedom I would start with groundwork... even just hand walking and then trotting for a week. Then I'd do some lungeing and some trust exercises. Then when you do go to ride, lunge first and when you get on focus on having his attention and just stick to one end of the arena. Do circles and squares... etc. At the start you don't need to ride for long you could maybe only ride for ten minute or twenty minutes until you work your way up. That would be what I'd start with until he starts listening and then you can go into harder stuff, to get him fitter and all that.
Hi hun, I can imagine you have found all of this very distressing. It's not a nice thing to have done especially after worrying about your horse following an injury.
Personally, I would start with groundwork like long reining, lunging, free schooling etc. He will be lacking muscle from being out of work for 7 weeks. He will be feeling very fresh due to the build up of energy. I hope this helps. Take it easy.