No physical symptoms other than an irritated throat and point headache (left temple). But I've been feeling horribly spaced-out all day (which is different from tired).
I hope the Claritin begins working its magic soon. I started taking it last night, and so far it hasn't kicked in yet. Usually it takes a couple days, though.
Edit: Forgot to mention ... we had the longest power outage ever at work today (by my system clock, it lasted a good half hour). Between those two things, my productivity today has been very low (but not quite zero).