Whats the first symptoms of the flu? I thought it was chills, headache etc. but right now i have a very yucky, pucky feeling in my stomach. and unfortunately this happens quite often. i never puke but am always scared I will. I also may add I have IBS. Btw, I always take vit and am reguarly using hand sanitizers and making sure i dont touch my mouth with my hands. But could this possibly be first symptoms of the flu? or just my IBS?