Had mono in uni, for 7 fucking months. Like any good idiot, I wrote it off as my period first, then just needing to chill a bit. Then I got worried and saw a doctor, who said “mono almost never lasts 2 months, we’ll run some tests”. And meanwhile I should work on my stamina and keep training.
After half a year I got a different doctor, who did the mono test and tadaa. Told me to sit and do nothing, doctors orders. 6 weeks later it was gone.