No, if you don't maintain a 4.0 your first year you're basically screwed as far as med school goes.
Joking aside, of course there are. A vast majority of people have lower than usual GPAs when they transition into college. It is expected, which is why these aren't so much 'success stories' as they are normal trials encountered by the majority of students.
Whatever you are stressing out about, I can assure you is fairly trivial. Unless you failed every course, you are fine. Freshmen paranoia seems to be strong today.