hy, its mudassar a physiotherapist from pakistan, as u described in ur post, this is the typical condition known as Wikipedia reference-linkrotator cuff syndrome,,,,in which the supra spinatus muscle is most commonly affected,,,,,,,,as u told that u hv gone through physiotherapy earlier,,,,i think furter physiotherapy sessions will have nothing to do with your problem, except minimizing your pain, ,,,,,so the ultimate option could be a surgery,...so i advice you to go to a city hospital and discuss all this with orthopaedic surgeon, with your medical record,,,,,
regards