Last March on and off we battled the dreaded stomach bug that came and went, then we had some minor "my belly hurts" issues the seemed to resolve on their own.
I am a long time anxiety sufferer, but to be honest don't know what my symptoms were (if any) when I was six.
I know it really took off when I was eight, and I had a constant fear of vomiting.
So, to my son. He starts 1st grade tomorrow in the school that he had kindergarten in. He knows he has a new teacher and some different kids in his class. Today we are hanging out because my wife had to go back to work as a teacher and it's just he and I.
My wife said to go by the school and drop stuff off (Crayons, pencils, etc) and we would get to see the classroom and maybe the teacher.
Well, we did that, teacher was not there, but we left the stuff in the classroom.
Then we went out for lunch at a fast food place and before we even started eating he told me his belly hurt. I believe he was initially hungry and said it started when we sat down. (Who knows!)
I am thinking maybe it feels funny and now he is nervous about school. He downed two juice boxes and some food, but still is being funny.
I get so upset when he complains of his stomach, which are two fold. One, because I don't want him to throw up, a fear of mine is catching a bug and two, because I can no longer tell if it is real or not.
We had an issue in the spring where he battled on and off for a month with a bug, and then pains on and off. They seem to have resolved on his own and occasionally he has made a mention, but nothing consistent and one time he had diarrhea so that one was real.

Long story short, because I feel like I am going to be anxious about him being anxious, is, how should I deal with it? I don't want to teach anxiety or identify with it, but I also want to ensure my son is OK.
I believe at times I make it worse. Everyone tells me I should let it go, I just can't ignore it and I think it is for his and my own issues.