OUCH!!!

I've had this years ago in one leg and it was excruciating. I was prescribed some very strong muscle relaxants but me being me didn't read the instructions properly so ended up doubling up on the dose on the first day. Worked though

The only other thing I can recommend is a visit to the chiropractor, as I think the cause is a trapped nerve between the third and fourth vertebrate.

Hope it clears up soon for you.