You're completely normal... I had to leave my two babies for 2 1/2 weeks with a friend I've known forever and who has 5 kitties and a bigger place... so I knew they would be fine... but it was still horrible having to leave them and I felt terribly guilty because it was for vacation, I think I ended up calling every few days so see how they were doing. I missed them horribly. (and you're not the only one that has an animal they shouldn't... my apartment has a one animal limit