Bad wheel

Well after my 15.5 miler last Sunday, my knee really started to hurt during the run, and as soon as I stopped the pain was intense and almost made it hard to walk. I went to a ortho yesterday and was told it was either an inflamed IT band which is normal for runners or its a lateral meniscus problem. I dont want to spend 500 for an MRI right now, so ill roll the crap out of it with my roller, stretch a lot more, ice every day and take ibuprofen daily no matter what. I will also change my shorter runs with cross training and focus my energy on my longer runs. blah..