Idk what to do.. everyone is sick 😷

Caitelyn
4 ppl in my house have started to throw up in the last 3 days. Not eating anything in common so it's not food poisoning. First it was my niece she woke up in the middle ofbthe night Thursday throwing up all night. Then my nephew (her brother) started almost immediately once they got home Friday morning. We cleaned and disinfect being I have a 3 month old.. thought it was over. Get home from church this morning and my step dad is now puking his brains out. Now I'm confused because he barely comes out of gis room . Other than to say a few words amd get something to eat he is ALWAYS in his room Plus it's days after the first case.. Now (early Sunday) my niece who wasn't even here the whole weekend is throwing up!! I'm what's going on but I don't like it. I don't want what ever is going around and I sure don't want my baby to catch it.. but i don't wanna stay locked up in the room for God knows how long.. I'm just sad and needed to vent about this here annoying bug plaguing my family at the moment..