Rotator Cuff Pain

I've been cycling properly for around a year. However recently in my right shoulder I get this awful pain coming from around the rotator cuff area. If I carry on for long enough i get pins and needles in my right hand. The only way I can make it feel slightly better is to take my both hands of the handlebars and press my shoulder back with my left hand this makes a loud clicking noise and then it feels a bit better. I've ruled out bike fit as I've tried everything shorter stem, raising stem you name it. I find it strange how this only occurs in my right shoulder.
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