This isn't some immature freshman mistake. By the time you're a junior, should know better.
I can't sugar coat this. Your medical career is over. If not, it's in a state of deep stasis.
Don't screw up again.
Work for few years, engage in many acts of service to others less fortunate than yourself, and especially try to have positions of responsibility.
Here is the mindset you'll be facing, as Adcoms will ask:
1) Is this the sort of person we want in our Class
2) Why take this kid when we have so many other candidates who didn't cheat?
My clinical colleagues especially take professionalism VERY seriously. They know that dishonest doctors start out as dishonest students.