frustration

My MRI on my knee was totally normal. So the good news is that everything looks fine. Bad news is that it still hurts and they can't really figure out what's wrong. So I'm back on prescription strength anti-inflamatories, keep running, ice 3 times a day, and I have to go back in a week. I'm so frustrated! I don't care what is wrong, I just want to know so we can fix it and I can keep running without feeling like my leg is going to snap in half.