How far can I go in gymnastics at this point?

I started gymnastics in fifth grade at ten or eleven and now i am 13 just starting level 5. How far do you think I can make it by the time I am 18-21. I am very dedicated to the sport. I taught myself a kip and am working on my handstand cast. I go to the gym 4 times a week, monday wednesday and friday are the events and tuesday is tumbling. On event days I go for hours and on tumbling I go for 1 hour. can i make it to nationals or close. And one more question, how do I get 5 flipflops?