8 weeks and stomach bug

I went to the dr today for my first ultrasound at 8 weeks 1 day. Last week my 2 yr old had the stomach virus. I came home from work early today nauseated and unable to eat. Now I have it full blown! Anybody else experienced stomach bugs this early In pregnancy? It’s hard to keep myself hydrated bc I want nothing. I have heard it’s nothing that will harm the baby but I still can’t help but worry.