"Physiotherapist" - that's a good word.
When the bruising has gone down, when the discomfort has disappeared. Go find a physio. They are to be found in the telephone book.
Stand in front of him or her (they are usually 'hers'), pull out your hanky, put your hand on your back, step forwards saying 'ouch' and say: "I've fallen off me horrrse" in a wounded and pitiful voice (whatever that is).
With luck the lady in the white coat will take pity on you, she will usher you in to her parlour and work bench. She will ask lots of silly questions. Then she will proceed to give you a free session of hands on tender loving care - which most likely will hurt. But its necessary.
Within a weeks or you will be ready to do it all over again.