You are having a perfectly normal reaction. I worry about my kitties even when I am away at work and I know that nothing will happen to them. When I go out of town (even for a weekend), I can hardly wait to get back (and I have been known to leave early just to get back to see the cats). I have to go back home this summer and there is a part of me that is dreading that because I will have to be gone for at least a week. I don't know what I will do when that happens