this is what i found when i did a search to try to help you out...
It will take three weeks before there are any signs that your cat is pregnant. The first sign is when she doesn't come on heat two to three weeks after she mated. The first visible sign of your cat's pregnancy will be her swollen nipples which will be a deep coral pink. This pinking will be more noticeable if this is your cat's first pregnancy.
Your cat will sleep more and possibly become a little more affectionate towards you. She may spend most of her time indoors showing little interest in going outside of the house.
After the fourth week or so, you may notice that your cat is gaining a bit of weight and is now looking pregnant. By this stage of cat pregnancy the kitten's internal organs will have formed and the embryos will be about 1 inch in length. In five and a half weeks the skeletons will develop, and a little later than that you may see movement. When mom-to-be is resting, look for rippling motions along her flank.
No medication should be given during feline pregnancy, except in emergency.
At the sixth week of your cat's pregnancy, her nipples will start to swell with milk. In the wild a pregnant cat will gorge herself as she cannot be at all certain of when she will catch her next meal. Your cat will demand more food, but may prefer that food in smaller, more frequent meals. Give her what she needs but try not to overfeed as too much extra weight could impede a trouble free labor. Your vet can advise.
Activity should be present throughout the cat pregnancy in order for your pet to maintain muscle tone and prevent gaining too much weight. In the last days of the pregnancy however, you will find that your cat will slow right down.
Cat Pregnancy - Prepare...
About a week before the birth your mom-to-be will start to hunt around for a suitable nesting place. Open closets, draws etc. look like good places for a nest to her, so keep them closed.Every Cat Pregnancy Should Be A Wanted Pregnancy.
Prepare a few good-sized cardboard boxes filled with paper (for her to tear up,) and leave these in warm, draft free places in a quite area of your home. Your cat will prefer not to have too many humans (or other family pets) around either when she is ready to give birth, or when she has her kittens. Let her decide which nesting box she likes the best.
A few days before the birth your cat's appetite will subside and she may go off her food altogether.