Hi. Welcome to TCS. If you post your questions under the Pregnant Cats and Kitten Care forum you'll probably get more responses. Also, read some of the threads there. That may answer at least part of your questions.
How long have you had the cat? Do you know when she's due? There are different signs depending on how far along she is.
Hi there we're so happy to get the chance to welcome you and your furfamily to TCS. I'm sure you'll enjoy your stay with us - we're one great big family and you'll find loads of friends here. If I can help at all while you're finding your way around TCS just click on my username and send me a Personal Message - I'll do what I can to answer your questions
As the last poster said, you best bet for good advice with your pregnant kitty is in the Pregnant Cats and Kitten Care Forum. Just pop along there and I'm sure you'll find some advice from knowledgeable people in there.