I can only guess that I had mono. When my brother was sick all the time they gave him a blood test and had found that he already had mono. It occurred that he most likely had gotten it from me because there was a time which I though I had the flu, but my glands were so swollen you could see them sticking out of my neck, my throat was swollen so bad that I could not swallow anything, and the only time I drank water was when I was rather going into the symptoms of sever dehydration. I slept for 4 days days straight, the first day I slept for about 18 hours and then woke up about once every 8 hours and that was only long enough for one norco (painkillers from an injury that I had left) to knock my ass out again (or relieve the pain enough so that I could go back to sleep as I was ridiculously tired) for another 8 hours. I was still weak, sore and extremely sick for almost two weeks, but I couldn't sleep all day anymore, I was still sick for another 2 weeks and was weak and sore for almost three months. Shorty after my brother got that sick as well, which was most likely the time he got it which would have meant that he got it from me.