First time ever I have experience a 'real' dehydration, a 5-8% decrease in body water, causing fatigue and had no any sort of energy to go to work. I will never ever overestimate myself, no half marathon in a fever, must rest enough before and after any runs, and plenty of water after.
The doc has given me 2 days of MC, plus the EL I took yesterday, hopefully I will be fully functional by Friday. : )
Now, what's for dinner? (not porridge)