Is anyone else traumatized by the sheer amount of times you get sick?

I have a 2 and a 3 year old and we have been getting sick every month for 2 years now. It's just gotten to the point for me where I am afraid to leave the house, go on trips, or commit to anything with friends because I don't know whether we are going to be sick or not. Don't get me wrong, I do still go out and go on trips and do things with friends, but now I get so stressed about it and I feel like I'm constantly paranoid, washing their hands, overreacting at the slightest cough. Anyone else go through this? I totally get it don't have control over the matter. I just don't know why I get so obsessed and concerned with it.