OP, I agree with the above posters.
Firstly, in the grand scheme of things, what is worth more, your education or these loans? I'm an attending now and I will be paying off these loans for a long time. But, that's just it. They are loans. I'm not suggesting at all that financial situation before medical school isn't relevant, but the loans are the future. Of course, you should be smart with spending while in medical school and residency.
Second, yeah, you should consider the HPSP if you want to join the military. It would be a wonderful way to pay for medical school. But remember, you owe them years.