I was diagnosed with mono a couple of years ago, but I think my symptoms were more on the severe side of what you're describing. I was feeling so bad, I asked my mom to take me to the ER, and that says A LOT because I HATE going to the hospital.
I had chills, high fever, and my whole body was sore. My symptoms were generally flu-like though I was not vomiting or nauseated. My throat hurt so bad, tonsils swollen really big. My back hurt very very bad in the kidney area, and I could not sit or bend forward because my liver was inflamed (so the doc said anyway) and it hurt something awful. My original doctor in the ER was going to discharge me with a flu diagnosis, but I insisted there was something more wrong with me and I wanted blood work done. I told her that if she wouldn't do it I would just come back after she discharged me. It was the end of her shift so I saw a different doctor who agreed with me and did the blood work. An hour later he came back with the test results, I had mono and strep throat.
Worst experience of my life I tell you, I was in so much pain. Like I said, I think my symptoms were on the severe end, I don't usually show symptoms of being sick until I am very much so.
The doctor in the ER gave me pain medication, and a fever reducer (I think it was ibuprofin but I can't remember) and I felt a lot better when the meds kicked in. He also prescribed a month's course of oral steroids (prednisone).