I felt that way a couple of months ago and I turned out to be anemic. My GI ordered a blood test to test for thyroid, vitamin deficiencies, etc. ... they took three vials of blood to get all the tests done. My potassium was a little low as well. You may want to consider a blood test to rule anything out.
Diagnosed UC April 27, 2006
Remicade infusions: 7/21/07; 8/18/07; 10/13/07; 12/15/97;
Lialda, 4 tabs in the morning; Protonix; Prednisone 4/27/06-present, was almost off, back to 40 mg; 12/1/07 - 12/29/07 weekly Venofer (iron sucrose) injections;
9 mg Entocourt EC; Xanax as needed; Lexipro 10 mg, Rowesa; Asacol; Colazal three 750 mg capsules 3X day; Bad reactions: Imuran( 2/07)