Aw Thaya that sucks big time
I know all about shoulder injuries fleshin' things up - its been nearly 18 months since I buggered my shoulder up, I got calcifying tendonitis in my left shoulder which led to one of the tendons tearing. Started off with the shoulder just hurting, which got worse and worse, couldnt sleep on my back or left side and woke up if I rolled over in my sleep. Ended up losing the feeling in my arm (arm would give out and couldnt pick anything up and hold thing) intermittently and then altogether. Had an operation in May and have been seeing the physio since, as I still havent got much strength in my left arm (its currently about half what it should be), still drop things and still go numb. Every so often the physio tapes my shoulder down (starting just above my boob and going half way down my back to pin it down and restrict movement) for two weeks at a time.
Like everyone else has said - listen to the docs, listen to the physio, dont put too much pressure on yourself and try to chill out a bit.
As for the ex, short sharp kick to the balls
Hope you feel better soon
