awwwww you poor thing! I totally understand I really do I worry about my babies too but at some point things will get easier. I know what I'm going to say might not be what you want to hear, but this is what was said to me ... you can't control the world and what others do but you have to relax and let life go as it has been and stop worrying so much that something might happen it's really bad for your health. If it would make you feel better set up the baby cam and just set limitations on yourself as to when you can check it and say in a month take it down and you will probably be more relaxed because nothing will have happened. My son also says "if someone takes those dogs mom they will bring them right back" he thinks my babies are ummmm brats LOL
my thoughts and prayers will be with her as she gets spayed.