The last few days my body temp has been 1 - 1/2 degrees F below normal. I ache a bit, have no get up and go.Basic blood tests showed a slightly low White Blood cell count. - rest in normal range. 20 years ago I had Toxoplasmosis and one of the symptoms then was low body temp when I felt bad. I have been retested for that. I am fit, sleep well, have pretty good diet. what other factors should I consider as cause of this?