So about 2 weeks ago I got some sort of stomach bug (diahorrea) and felt awful for 2 weeks, literally felt so tired and crappy for 13 days.
It cleared up eventually and I was ok for around 3 days, however last night I felt really sick and weak, and had a high temp, so i went to sleep. today ive woken up and i feel rotten again, just so weak and fatigued/lethargic. I'm 22 years old, i work out 5 times a week, why am i sick again and what could it be?