PS..........i sent a lengthy response, but, I forgot to mention. Before trying anything else, as you found out treatments can be very painful.........I would suggest, First, reading up on any potential treatment you might want to try next time. Example, should you be sort of interested in Ozone , Prolozone, or any other therapies out there, there are many books . I always buy 3 different books on the SAME subject, as some really point out the .....good things, while others may give you info on the things to watch out for. Such as PRP that you had. I thought about it, but after reading the parts of pain, for several weeks after injections, and then high probability of needing more injections, I decided this was not for me...............So consider getting as much info as you can on any treatment. At least you will know the Pros and cons, if the author will be truthful in pointing both sides out...............Don't only go on Amazon, for a book. go on Google, type in what you want...........EX......Books on Ozone medical therapies , Books on PRP medical treatments etc. Google should have more options than just Amazon. I search both places.......