It has been done before. It really sucks when someone can't attend medical school because they can't obtain loans. In either case, take the advice offered by "julestx" and repair your credit. The first thing I would do is look at my credit report to see what is causing such a low score. It may be something really minor such as you forgot to pay a bill. Once you "fix" your credit report as best you can and if you still think your score is too low, you may have to start looking for a cosigner with good credit. Good luck. Ciao.
"To achieve success, you must first define success."