I had mono at the end of my freshman year of college and during the summer. Mono knocked me out for three months. I was so fatigued that I could barely get out of bed. It was awful and it started with strep throat.
My diet was pretty limit because my throat hurt so much. I ate soup and drank tea and juice for a few weeks. I was told not to eat high fat foods and not to drink alcohol.
I hope that you don't have it. Feel better.