Get well soon! These guys suck and take out a lot of daily joy as every task feels immediately like a mountain.
Dont go running again too fast once you feel better. Virusses like to keep you accompanied if you go all in again too fast.
It aint the age...i had it recently as well. ;))
It's dragging now, I woke up feeling worse today, after feeling OK for the last couple of days, it's all in my sinuses, yuk!