Not that i know of!!! never happened to me...id speak to your dr or pharmacist if i were you!!! good luck! caz xx ps you have'nt justdramatically dropped your caffine intake by any chance or upped it???
I'd agree, it sounds abit like caffeine withdrawal. If not, maybe drink more water and really reduce what you're doing, rest lots and pamper yourself a bit.
It's not good for the first 5 days, but you'll feel great after that.