cat might be pregnant

Im in need of some questions.

the first question about pregnancy is my cat has grown in the stomach and shes tiny so she didnt grow anywhere else just the stomach area. i heard that could happen sometimes that cats can just tend to get fat in the stomach. But also i saw some pics of cats nipples when theyre pregnant and they look more noticable and more out if u know what i mean also there more like hanging kind of feeling. another thing they are crusty kind of like hard crusty. I realized another thing she seems to want to like eat 3 times a day and she hardly did that when she wasnt big. but i called a doctor. and he was like well cats can get bigger if its there first time in heat. but I dont know. Im confused. also if she is pregnant can she get her shots or no


thanks
berkley

if you have a pic it would help. Here are a couple of pics of my cat when she was VERY preggo...maybe it will help...she has since had 7 kittens. By the way, you can click on them to make them bigger.

http://i166.photobucket.com/albums/u100/NadineF_photos/2007_0305poorpreggo0001.jpg
http://i166.photobucket.com/albums/u100/NadineF_photos/2007_0305poorpreggostill0001.jpg
http://i166.photobucket.com/albums/u100/NadineF_photos/2007_0305poorpreggostill0002.jpg

if she is pregnant its not advisable to give her shots.
how old is she ? if its her first heat im guessing under a year old? i noticed with my 5 month old kitten when she went into heat her nipples got pinker and larger and i know there was no way she could get pregnant so it wasnt that . she was spayed 3 days later.
if you want to know deffently your best bet would be to go to the vets for a check up , any questions or worrys you have im sure they will be happy to help , just like we are.

Only a vet can really tell. But if she is an outside cat or got outside when she was likely to be in heat, or even not, as male cats will mate with females even when they are not heat, then she is likely to be pregnant.