Should I exercise or stay in bed?

I've been feeling under the weather for several days. I have a low grade fever and slight body aches and a headache. I usually feel better in the evenings and think that I must be over this. But again, I'm up this morning feeling yucky again.

I really wanted to go over and do hill repeats on Mt. Tabor, but I'm wondering if I should just go back to bed.

OK, I figure I know what the answer is.....but let me hear from you all anyway.