See your Doc. Physical therapy is what they start everyone out on first. For most, it works, it takes time though, you aren't going to fix muscles, if that's what it is, in a few days. For me, it was a round of meds and rest as I was reinjuring it every time I worked. Good luck, it happens to a lot of folks, you aren't alone. Don't suffer for weeks taking OTC stuff and toughing through it, it may be something else. See your Doc.