I have injured my it band and have been doing stretches for 3 weeks now with little change in pain level--what other options are there--?

Foam roller. If you want to try self-treatment, use a foam roller and lay on it with your affected thigh down on it, rolling up and down the side of your leg with your weight on it. You can also physically massage/stretch it out with your knuckle or something else hard like a lock. Of course, you should be evaluated by a doctor to make sure you have a tight it band first...