I think my body has learned a new trick; when I get heavily stressed, as I did last night, the next day or so, I feel like I haven't slept in days, and like someone beat me with a tire iron.

I've also got those delightful chest pains in the right side of my chest, which usually only happens when I've been consuming caffeine regularly.

I'm exhausted enough that I want to have coffee to wake me up, but the chest pains and headache I've already got are, for now, a strong enough warning sign to keep me away from caffeine.