Shoulder problem after backhand swing

[Takenobu]

Hi

The other day I was playing with one of my friends, and I was only receiving ball on the forehand, so after a few errors on the backhand when I finally got a chance, I decided (out of anger) to swing as hard as I could... however just after I had hit the ball a violent crunching noise came from the shoulder.

Has anyone tried anything like that before? My shoulder still hurts, but normal forehand/backhands shots don't hurt at all, while serves only hurt a little bit.

I think i'll take a rest with my shoulder untill this wednesday...

Thanks!