Is there such thing? My 10 year old cat was in heat several weeks ago, and a male cat visited, and by now (if she were pregnant), her belly would have started to bulge out. But she's at her normal size so I'm 99% sure she's not pregnant. The thing is, she's acting very strange and needy lately. Always meowing, needing attention, trying to jump up on my lap and knead into my legs or stomach. It's as if she's freaked out by the fact that she didn't get pregnant this year. She had her last litter last year, and has had several other litters before that. Has anyone else had a similiar experience? I'd appreciate some insight.