Alright, you're still here, I guess you need a real answer.
No, you're not hopeless, we're sure of that. We're just not sure how much harder it's going to be for you than if you'd never gotten those Fs.
The situation: It's hard for us to tell how ADCOM's would respond to a good (3.7) GPA after 1 semester of all Fs. Will they see the average, or will they see your performance after 1 semester? It's tough to tell.
Advice:
1) Look into the option of a Doctor of Osteopathy. It's like MD, but with different initials (DO) and different rules about admissions. The main different rule is that if you retake the classes you failed, the new grade you get counts. This effectively erases your disadvantage
2) Look into the option of a 6 year BS/MD program. They guarentee that if you keep a certain GPA over the course of your first two years, you will be in their MD school for years 3-6. At the end of the six years you're awarded both an MD and a BS. If you're accepted into one of these programs you have no problems, since you'll be judged exclusively on your performance in the program. Couldn't hurt to apply.
3) Talk to the school where you failed, explain your situation, and see if you can get the Fs changed to Ws. I mean, you didn't really fail the classes so much as you failed to formally withdraw when you walked away from them, due to a medical issue. Maybe play up the accident, how you just could never come back after the trauma. If they're willing to work with you you'll have no problems.
4) Talk to an ADCOM member (I know there are some lurking around here). I have a hard time believing that they would hold 1 semester where you got all Fs because you walked away from the courses against you just as though you had failed the classes. It would just be stupid
5) Seriously, shadow a few types of physicians and see if this is something you want to do for a living. You might find it's less fulfilling than House makes it look. Also investigate the costs and content of the training you'll be going through. Read through these forums to get a feeling of what you need to do to get in (volunteering, GPA, standardized tests, etc). Read though
http://pandabearmd.com/, just because.
6) Any undergraduate degree works for medical school, provided you've done the prereqs. See if your company will pay for you to go back for a degree in your field. That way if you don't like what you see in Organic Chemistry or while you're volunteering you'll have your old job to fall back on, with better prospects.
7) Investigate other fields. Maybe you'll like engineering. Or Computer Science. Or Building construction. Or nursing. Or the military. There are lots of great, non medical fields out there that impact people's lives.
Good luck.