I brought her into our house and she was looking every where trying to get in small spaces. She was a tiny momma now she is pregnant and huge. I was wondering how I find out how far along she is. I don't have money for a vet and she is not my cat. But I don't want her to have them outside. She is huge I felt the babies move her nipples are pink and swollen.

First of all, what a wonderful thing you have done for this cat and her babies.

Until someone who knows the answer comes along I'm posting this site for you - Pregnancy and Birth in Cats - So Your Cat is Pregnant - What Next

Cats are pregnant for about 9 weeks, and start showing around 4-5 weeks. If you remember when she started to show, then you may be able to guess within a week or so.

With cats, belly size really isn't a very good way to judge how far along they are. The more kittens there are, the bigger she'll get.

If she seems to prefer some spots over others, then try to make them as comfortable as possible. Get some boxes big enough for her to stretch out completely and put newspaper in them. When she starts to nest, she'll be able to shred and arrange the paper how she wants it (it's also easier to clean up than blankets). Make sure it's warm, dry, and dimly lit and she'll take care of the rest.

Here's another good site - http://www.marvistavet.com/html/giving_birth_to_kittens.html