That itchy feeling at the back of your throat.
Suddenly feeling cold even though the air-con is off.
Extreme fatigue - especially if it was (Kindergarten) Sports Day for the early part of the day.
Desire to be manja-ed by Mum and/or BabyLuv.
Do you have the symptoms above?
Most probably, you might be down with something.
High chance that you might be.