START OF THE FLU, STOMACH FLU? help...? HEAPS OF ADVICE PLEASE!?

You dont sound sick. Unless you count paranoia as a sickness... Calm down until you get sick (it'll happen one day) and don't worry about any of these things until you are actually sick. You will know when that happens. Then you need to rest, drink fluid (not lots, just a normal amount) and take tylenol for fever/headaches/pain (tylenol and cold and flu tablets do not make your flu go away, its only to lower a fever and control the symptoms, so if the pain does not bother you and you dont have a fever you dont need to take it). Also, if you do get sick, wash your hands as much as you can and stay away from everyone.