[cypher]

It's not that common but occasionally hamsters are pregnant when sold.
I'm not a syrian expert but I think the gestation is about 16 days so you will probably see signs of her getting bigger & more obvious baby bumps fairly soon.
I think it would be best to treat her as if she is pregnant for the time being, provide her with plenty of substrate & plain white shredded toilet tissue as she may start to build a big nest ready for the pups if she is pregnant.
If she does it's best not to disturb her too much & as it gets close to the time she would be having pups don't disturb her at all, just put food (lots of it!) & water in the cage & leave her in peace while you wait to see if pups emerge.

If you have a photo of her it might help see if she is pregnant or it's something else going on with her.