Sounds like the flu or another similar virus, honestly. Especially since you're feeling better after a few days. If it'd make you feel better, though, you could post what you're eating here (or open up your tracker if you're using it) just to make sure your calories are OK and so on.
Height 5'8 1/2"
GW: Originally 150. Maintaining at about 146 since June 2013.
5K 4/21/11: 31:55
|39 Maintenance Weeks