Cos there ain’t no exhaustion like this exhaustion 
I am literally working, sleeping ( badly) working and repeating.
Normally if I feel a but down or a bit run down I can push myself to do a bit more exercise but I literally can’t get my legs to work when I’m off duty.
I know it’s not physical because when I’m at work I can go 12 hours at full throttle.
How the hell are other people managing-it’s a pretty common theme in my team so we’re not really much use to each other in terms of advice! My diet is probably crap. My skin is awful and my house is a bit grubby ( I don’t even get stressed about the housework any more
)