It can't hurt to go see a doctor mate. If it's nerve damage then it needs professional attention. In the meantime, use 2 paracetamol and 2 ibuprofen, 3 times a day for no more than 3 days to help with the pain, and avoid straining the muscles. Just for the record, both ibuprofen and paracetamol are anti-inflammatories, but whilst para is more harmful to the liver (hence why you have to avoid alcohol), ibu is more harmful to the stomach (so you need to avoid acidy foods).

Chances are it's just a strain, in which case the doctor will be able to put your mind at rest and tell you the right thing to do.