I have the same things going on in my house. My newest cat goes crazy and seems to have separation anxiety when I go into the bathroom. He will sit out there and meow, catawal, scratch at the door and stick his paws under the door in a frantic attempt to have me open the door. When I do open the door, he just lays down in front of it, as if that's to protect me from his 6 other feline companions that may also attempt to gain entry. Never a dull moment.