could my dog be pregnant even though she keeps humping her stuffed toy?

If she came in contact with a male dog when she was in season you can bet she is pregnant.
Humping toys has nothing to do with it.

Best you have your dog spayed before you bring another litter of pound fodder into the world.

ADD: Yes, Vanessa puppies are beautiful creatures. The trouble is back yard breeders exploit their pet dogs for money. Dogs are killed in pounds in tens of thousands every week because back yard breeders like you are producing too many dogs when there are no homes for them. BYB's like you created the killing fields the pounds have been forced to become.
You can bet I'm negative about scummy back yard breeders producing badly bred dogs for money.
Shame on you for risking the life of your pet dog 4 times.
Ignorance is optional. Educate yourself.

The "humping" you are speaking of has nothing to do with sexuality. It is a dominance/play behavior. It has nothing to do with her being pregnant or not.

Take her to the vet. They can give you a definitive answer. Consider having her spayed while you are there.

Humping has got nothing to do with pregnancy in this particular case.

Female dogs hump each other just to show the other that she is the superior in the dog society.

If ever your dog was in season recently and mated, she would have puppies in 60-63 days from mating. Perhaps you could calculate a little when she could have leaked out to meet Romeo.

Actually her breasts change by the day and the signs will be noticeable when she is about one month pregnant.

Spay your dog even though this is not sexual behavior. This is dominance behavior and it could lead to dominance problems with humans and other pets. Reinforce basic obedience commands.

Vanessa, your disgusting and self-serving answer made me throw up my Gardettos. Thanks a lot, you puppy-mill princess.

if you were a breeder you would know if your dog is pregnant or not,
get your dog de sexed so the puppies dont end up in the pound, like so many dogs do each day & get put to sleep cos people want to breed there dogs, so make some money or it will be good for the kids to see some puppies, or it will be good for the dog,

unless your dog is genetically tested & the father is to, why are you breeding, not to improve the blood line at all,, get your dog de sexed,
as i said dogs die each day because people like to think there dog should have a litter, for no great reason and then irresponsible owners neglect them and they end up in the pound on death row, help the world and dont bring me puppies into this world

Well, the only way she could be pregnant is if she mated with a male dog.
Is she in heat? She just could be a little frisky. My friend had a chihuahua who was female and she humped a german sheperd beanie babie plushie, that was about her size. You don't have to spay her, but if the humping continues and she humps other things and it becomes a problem, then maybe you should. Don't listen to Autumn, she's kinda negative.
Puppies are a wonderful thing! As long as you live in an area that you know has potential buyers, and you can take care of them properly, let her have puppies! My mini dachshund Angel has had 4 litters before we got her spayed. All of them found good homes, as we get to know the owners, and they live locally around us. We even kept a few, and got them fixed so Lucky nor Angel could inbreed with them.
Wish you the best of luck with your frisky little girl :)

One doesn't have anything to do with the other. If you don't know this, you should have your dog spayed. Dogs do not pleasure themselves- it is dominance or the biological urge to reproduce. Humans and dolphins are the only mammals that do it for pleasure.

um it sounds like your dog is a male, because girl dogs domt hump toys, only males do. And no "she" wouldn't be pregnant because its a guy.