My partner and I were given a cat 3 days ago. She is heavily pregnant, but the previous owner couldn't be sure how far along she was. She is constantly purring and is constantly seeking attention from my partner. She has been sleeping all day behind the sofa, every day since we have had her, but now she seems very restless and is pacing back and fore. She is meowing occasionally and the last time she used the littler box, she left some bloody mucus behind. Can anyone tell me if she's in labour, if so how long is it normally until she would have her babies?