I got my physio after developing acute calcific tendinitis in my shoulder, and she turned out to be great with ME as well. Try ringing the practice and asking if they have any physios specialising in ME, and if you can find out what their approach is. Mine said that my level of activity was already quite high enough, just getting around the flat was enough, so she didn't prescribe exercises for that. The exercises she prescribed for my shoulder took into consideration the ME, so they were very gentle.