I got stabbed in the leg over a week ago and still feel pain and muscle tension. What should I do?

Almost two weeks ago I was stabbed in the upper leg area by a switchblade. There wasn't a whole lot of bleeding, so I just cleaned the wound and dressed it to the best of my ability, and went about my business. The actual wound has healed up and looks fine, but the muscle in that leg is still stiff and hurting, which makes it difficult to go up stairs, run, or even walk long distances. For various reasons I cannot go see a doctor. So that being said, I have several questions really: Is this pain and muscle stiffness normal for mild stab wounds? About how much longer will it last? What can I do to treat the pain (otc topical anesthetics and lots of otc pain pills help, but not much), and/or regain normal leg movement? I suppose if it is something to worry about I could go see a doctor, but I'd definitely rather not, so I just want to know if that's really necessary, what I can do on my own, and what a doctor would even do if I did go see one.