[Iceblossom]

Just recently my cat has been showing signs of pregnancy. She has swollen in the stomach and when you feel it, it's like you feel fetuses. The problem is she's been spayed for 6 years now, has been around many non-neutered toms, and has never gotten pregnant. I do tons of research on animals considering I want to be a vet, and I really don't see how it's possible. It could be her hormones thinking she's pregnant if she might of gone off and mated, but she's been fixed so these hormones shouldn't exist.
I was wondering if anyone knew why she's been like this. I've had a pregnant cat before and those were the exact signs she showed. If anyone knows what's going on could you please share some info, because I'm absolutely baffled.