While everyone is right, and you just need to relax, I find what you said in the quoted post a little unsettling. I've met countless people in my life (and have been guilty of it myself) who say things like, "I could have done X, but I just didn't care/didn't put in the effort/had other things to do." If you need to justify it to yourself, that's fine, but as far as I know, med schools don't care about your potential (Ex: "While this guy has a 2.3 GPA, he seems to be pretty smart based on his personal essay, why don't we admit him?"); they care about what you actually have done.
All I'm saying is that no matter how smart you think you are, if you don't put in the effort, then what does it matter?
Aside from that, all you need to do is drink up, relax, and work harder tomorrow. Even if you really do make a 3.0 for your freshman year, you still have 3 more years to make up for it. A 3.0 isn't the worst place to start from. Many people come close to failing their freshman year.