I have mono and a vacation comin up what do i do?!?

Ok so i found out i had mono about 3 weeks ago. Then i felt better for about a week and now its back! And my stoamch is all swollen and im a little tired but not as much as some people said they have been when thay had mono. But im leavin for florida in 8 days and im gonna be workin outside alot and swimming too so how can i get my energy back, feel alot better and make the swelling go down in my stoamch so i dont look huge when i go swimming with my friends lol help me please!!