Afraid my baby is going to catch this cold ...

So long story short, my oldest step son .... ( who btw is a grown ass man and idk why he's still living at home with us) went out with a bunch of people and came home with a cold. And he very nicely has now spread it to everyone else in my household. I myself just started coming down with symptoms about 2 days ago and my husband started feeling it today. So literally every single person in my household has this now. I just feel like it's inevitable that my LO is going to get it too and it really bugs me and idk what to do about it. She's 4 months and luckily hasn't gotten a single thing yet, this would be her first cold. She's EBF so fingers crossed she won't get it but I just don't see how if I'm getting sick and I hold her and take care of her all day. And to make matters worse, she's supposed to be going in to get her 4 month shots on Monday. I'm just really irked about the whole thing and I rreeaallyy don't want this little girl to get sick! Rant over