How do I stop the anxiety?

2 out of 3 of my kids got the stomach flu. My oldest and my middle (6 and 3) my oldest came down sick Monday, started puking that night and all day Tuesday. My son threw up Wednesday. It’s a long complicated story but basically my oldest was in the ER twice, admitted once. My son also went to the ER. It’s Sunday and my kids still arnt back to normal. This virus is terrifying for the average person and I have a vomit phobia. My youngest is 7 months, I can’t imagine her getting this. I quarantined my oldest and middle throughout most of their sickness and so far my husband and I havnt gotten it. But I go to bed every night dreading the morning, and I wake up with a stomach that’s tight and it scares me because I dont know if it’s just the anxiety or if illness setting in. Every night I start to feel better as the day passed but then night comes and it starts all over again. I just want my normal life back. I’m tired of feeling so damn scared. How do relax about this while still remaining vigilant about germs and hand washing?