Bookmark

I am an amateur classical guitarist but have suffered very similar symptoms.
Following seven years of not playing because of pain I read the Mind and body book. I was very excited by it and although I didn't really believe what I was reading I decided to give it a try,about six months ago, because of all the testimonials I read. Within two days my pain was massively reduced and I began playing again. I have been making excel lent progress until about three weeks ago when symptoms returned in my fingers and forearms and then this week in my neck back and shoulders.I don't know what to do now because I'm frightened of returning to the really awful pain I had before.
When I had physiotherapy I was told that the tendons were very sticky and did not slide across each other like v they should. Does this mean it really is tendinitis or could it actually be TMS?
Help!
BTW I can acknowledge that I am very skilled at certain things in life but believe I am pretty useless at many physical activities !