Dear chronie24 welcome!!!!
I completely understand your fears being a mother of two girls myself. Sometimes I'm thinking what is going to happen to my girls if go to the hospital again. But then again, I tell myself this: "every day when I have to go to work, I have to cross a big avenue. Do I ever think of the possibility that maybe I will get hit by a car and die? No, I don't. I just cross the street thinking of millions of small stuff except that!" Now, the chances of being hit by a car are much higher, than going to the hospital because of my crohns.
My point is that of course it's only normal to be a little anxious of what is going to happen in the future, but that way, we cannot enjoy today!!! Otherwise we wouldn't cross the street, walk outside, swim etc.
Enjoy every day of your life, and if something bad comes up, you can deal with it then. Don't spend everyday of your life worrying of what tomorrow may bring...