Hiya Lizatola
I'm a worrier too. In fact I was sharing at a meeting last night that as I start to feel a bit better about/with my A I'm remembering all the things I used to worry about (like the need to repair the kitchen ceiling) and thinking I just forgot to worry about all that stuff for a couple of months and now I'm remembering ughh !!
I worried so much about my kids' health when they were little my doctor cousin (patient man that he was) used to jokingly call it "hypochondria by proxy" In fact it was only when I shared with my girlfriends that I was worried that my worrying would do the kids some sort of damage that I discovered lots of them worried the same way.
Absolutely not medical advice but....kids' diarrhea can go on a bit, my doc once said to call back after 11 days. I hope he feels better soon.