Like I said before how do you know it was an sv? As I read several posts today a few of you, I forgot who it was mentioned either themselves or someone in the family had an'sv'. The only sure way to know is to have your stool tested. You may have felt that bad because of the headache. I know the few times I suffered with a sinus headache after it was gone I was weak and tired. I think we all need to stop jumping so quickly when we have something wrong with us and immediately NOT think that its an sv. A lot of the way we feel has to do with stress and anxiety. Go on the web sometime and type in 'symptoms of anxiety' there are a lot of them. Stomach pain, headache, lightheadedness, diarrhea, nausea just to name a few. You know if we hear someone has it, we immediately think we will get it and get ourselves all worked up. Food poisoning can cause the same symptoms of an sv. Foods that you eat can cause you to have diarrhea or loose stool.I know, I'm a worrier also and it sucks it really does. But I am trying to retrain my thoughts about all this. We should all try not to jump so quickly to think ourselves or others have an sv. I know its out there, and we know what to do to help to avoid it. If we have done those things, let's try not to worry so much about catching it. Kim