Take your animal to the vet to be 100% sure what the problem is, the sooner you do this the better.
Pregnant?
It could be puberty.
well i am not sure but i think it is normal because my dog had pupps and she was fine my friend's dogs nipples were swollen !
Have you taken a pregnancy test?
........... Did you perhaps mean to say "Vagina"?
what do u do if your stomach hurts
When it get swollen it might be that she is pregnet
only if they are pregnant.
Depending how swollen but it could just be pueberty. Her body or your body might be preparing to begin making breast tissue. My nipples hurt soo bad when I started getting my lady lumps
A dog's nipples may swell during of after her heat cycle. They can stay swollen for up to two weeks after her heat is finished. If they stay swollen longer than that, it's time to have her checked out by a vet.
She may be pregnaant, if not, in heat.
If her nipples are getting bigger then chances are she's on heat.