I went on google, and this is what I found:

http://www.mayoclinic.com/health/pin...879/DSECTION=7

I guess you should just rest the area, keep taking ibuprofen, and if it doesn't improve, go to your doctor. I hope it feels better! It sounds painful .

Also, from what I read, you probably shouldn't be moving boxes. Maybe you should talk to your boss and get a doctor's note so you can be excused from heavy lifting and such, if possible.

~abigail