National Health Service Corps can help repay your debt if you go into primary care. If you specialize instead you would, in theory, be making more money, and should have less difficulty paying off loans.
Student debt has the potential to get horrendously bad, but usually that's due to people making unwise decisions before they even accrue the debt ie getting bad loans, not applying for enough aid from outside sources, etc. You're already putting out so much time/money/effort to apply and get in to medical school that researching scholarships/grants/loans just seems to be more of a hassle. But now's the time we need to be doing it. It might even be wise to shell out some money to seek financial guidance..a little bit now might make a huge difference in wading through all the fine print and get you way better set up to manage your debts. If you do the work now, you should be fine for later.