Hi there, a mate of mine started med school and half-way through became very discouraged and wanted to pack it in and pursue his dream of becoming a pilot, but since he had already done three years he was finally persuaded to think it over a bit longer - the solution = he applied to RAF who have agreed to take him on as a medic AND provide basic flight training. He won't actually be required to fly in service, but i guess if one day he decides to leave the military he can join civvy street either as a doctor or as a student pilot with some handy experience under his belt. And he gets to be near some pretty cool machines that most civvy pilots wouldn't touch.
Don't know if USAF can offer similar schemes/sponsorships but worth asking. Both careers require alot of dedication & determination & realistically you do need to choose one path. Suggest you do some asking around current proffesionals before you decide - Happy searching