Well maybe you do need to cut down on your cycling until you are evaluated. What I read in that link said it will be exacerbated by continued cycling.

I know its hard to tell a cyclist to stay off the bike for a while, but I had to so that in order to let my SI joint heel, and then even longer while I had to wait for my custom crank set to be built. But the guy building me the crank set (who himself is a serious cyclist and a biomechanicist to the cycling stars) emphasized how important it was to stay off the bike. He reminded me that cycling with a normal crank set caused the problem, so how could I hope to heel until I had the modified one. When my bike was stolen, again I was ~6 weeks off the bike waiting for a new one to be made for the same reason. Its hard, but there are other ways to stay active.

In your case, riding until this is resolved will make it worse, so try some other activities that don't compress your iliac artery. I also imagine given the weather in boston right now, cycling isn't the best choice.

If you are anxious to get this over with while on semester break, call the doc's office and explain that, asking if you can be put on a cancellation list in case an appointment should open up at the last minute.

Good luck, and hang in there. While no one wants to find out they have a health problem, getting to the real route of a problem is the first step in getting in resolved. LIke my impaired glucose tolerance. Until I got that sorted out, I was gaining weight on 1200 cal a day! Or even my LLD. It also got to the point where it hurt all the time, not just on the bike, and people thought I was crazy.........