I really couldn't tell you what to do. At least, I can't tell you what you're supposed to do.
I can, however, tell you what I did when I believe I had mono. It was last year in March, and two of my friends had gotten mono around that time, too. For about two weeks, I was constantly tired and never hungry. I didn't go to a doctor, which is stupid, but I just slept a lot and let it pass. I basically disappeared from public life for those two weeks, and I lost a few pounds.
This really doesn't help you at all, but I felt like saying it anyway.