If you have insurance, or can just pay for it, a good physical therapist should be able to guide you in your recovery. Even one session, if they can survey your issues and evaluate you physically could help a whole lot. Many of the things I do in the gym (and some at home) I got from physical therapists over the years. I've never had a single session with a personal trainer. But I have a lot of knowledge about gym training techniques that I've picked up here and there. Personal trainers are going to be a lot less knowledgeable concerning your needs than physical therapists. The latter are very well trained and tested. However a person can be "certified" as a personal trainer far easier, after just taking a course I've been told. You aren't just trying to get stronger, you're trying to recover from injuries. Some spaced out sessions with a therapist is what you need (or even one), if you can manage it.