I don't know if it's a virus or not as no cold or sickness type symptoms just real extreme fatigue?
Me and my 7 yr old have both been extremely tired, nobody else in my household is like this. Normally 7 yr old is awake till gone 10pm out of refusal to sleep and up at 7am. He's been falling asleep by 8pm every night for the past few days and coming home really tired which isn't like him he's normally a bundle of energy.
I'm really struggling with fatigue to and have been sleeping 16 hours! 
Any idea what this could be? It's bizarre.