Neck crack sounded wrong and now it hurts, whats wrong?

This all started a few days ago. I woke up and as usual i cracked my nect but when i did for the left side of my neck, the usual neck popping sound was followed by an usual heavy grain mashing sound or something like that.Then my neck hurt alot and i couldnt tilt my neck to the left( can still turn just that i cant TILT to the left.). I went to the doctor and he said it was a mild stiff neck, so i got the usual muscle relaxants and neck pain medicine. But after a few days it sitll hurts and the doctor told me i would be cured in a day. So i wanna know if its something serious.

[doubletrouble999]

Try Infra red and if that doesn't work,then try a specialist.