symptoms

hyper-sensitivity
increased (bizarre; specific) cravings
obviously forced enthusiasm
general apathy, lethargy, exhaustion

also,

extremely realistic dreams—like, the kind where I forget to have a conversation because I'm pretty sure I had it last night.

and also,

getting caught up in literal meanings of words to the detriment of sentences—"Do you have views?" well, I can see the backyard from here...

(well, and a sore throat, achey muscles, jet lag...)