Freaking out about the Pediatrician's office!

Both of my kids have a cold now. The little one is worse than the older one but I'm hoping they both wake up better tomorrow. The little one has a well-check tomorrow and I'm torn on going for several reasons.... for one I don't want her getting her immunization while fighting the cold. This is fine because the one she is getting can wait until the 2 year appointment (most likely). I REALLY don't want to take both girls in with me with their immune systems down and my husband can't take time off like he usually does - it's his first day with a new boss! Do I reschedule in a week or two and get the well-check and shot out of the way? Do I just toughen up and take them both in tomorrow so the doctor can at least assess the cold? What if they want me to come back to that germy place in a week for the shot? I'd rather not go twice! I'm so afraid my kids are going to pick something else up there - like the Norovirus! It is stressful enough for me with one kid but with both kids it's double the anxiety of trying to make sure they don't touch anything! On top of all of this I have to make sure they don't infect other kids too.... I'm thinking if the baby is doing a lot better tomorrow I will just reschedule. If she is worse or not any better I will go in and put off the immunization until she is better and I will cross my fingers we don't get another sickness! Ugh - Mysophobia sucks!