A USMLE score of 200 doesn't automatically prevent you from matching with a "decent university program." What you must do now is focus on strengthening other aspects of your application. As a new third year, your focus should be on performing at a high level during your clinical clerkships. Of course, it's important to do as well as you can during the Medicine clerkship. As you rotate through the core clerkships of the third year, work hard to impress your attendings so that you can get solid letters of recommendations from them. I would also meet with your advisor (preferably in IM) on a regular basis during third year to assess your progress. These meetings should help you ascertain what you need to do to match with a desired program. Best of luck!
Samir Desai, MD