She is 7 yrs old, is not spayed, but is an inside cat. We notice tape worm segments and gave her Drontal to take care of that. He abdomen is large and swollan and hard. I at first thought she might be pregnant, but it's been a few months and no kittens. Took her to the Vet who did blood work, and everything came back normal. Could it be possible the tape worm is causing this, or even possibly that she did become pregnant and something has happend to the kittens before being born? She doens't seem to be in any pain, is eating fine, and no issues with urine or stool passing. Any thoughts on this would be greatly appreciated.