I continued training in mixed martial arts albeit light training as i said i thought it was a pulled muscle and would pass. However when doing pad work (holding the pads) i had to pass this job to someone else as it became too painful.
The doctor gave me a light exercise program to do to increase mobility in my shoulder; shrugging my shoulders, circling back and forward, arm against the wall pushing off with the back of the hand, etc. all exercises i had researched on the net for this type of injury, mobility has increased but not sufficiently to even consider starting training again.
I only hope that the injection will work