That's for real, yeah. IIRC, I could hardly drink water the whole time I had mono. Lost a ton of weight. Campbell's soup-to-go became my meal of choice, but I could only drink about half a can in one sitting.
Honestly can't remember how long I had it for... or much else about it. I think I've tried to forget the whole period. Spent most of the time asleep, and the other part wishing that I could be asleep. A constant cycle of waking up in a sweaty bed, late for my internship, hauling myself around for eight hours behind dead eyes, and then dropping out of consciousness. It probably lasted... a month? Two months? You'd have to ask HeyMrTough, she was around for most of it.
If it makes you feel any better, during this period I decided that shaving was too much effort, and grew a beard that I've had ever since. So maybe this is a good excuse for you to grow a sweet beard?