I had a random virus in 2010 that made me very sick for about a month, the doctors thought it was mono. I fully recovered, but then for about 2 years after I s

I had a random virus in 2010 that made me very sick for about a month, the doctors thought it was mono. I fully recovered, but then for about 2 years after I slept 12 - 16 hours a day and was tired all the time. No other changes. Completely resolved itself over a couple of months, after about 2 years. Viruses do very strange things to the body.