I do have a picture of a VERY preggers girl... Here she is... BUT...

You are more likely to feel the egs than see them. It is possible that she was bred by those males she lived with (depending on the age). Beardies can get pregnant much earlier than they should (not unlike humans!).
How old is she? There is a chance that she is just getting a belly from eating! Some of our "teen-age" girls get big pot bellies just from eating like little pigs!
Just in case she is pregnant, be sure to give her plenty of supplementation to aid with egg shell development. Make sure she gets all of the nutrition she needs.
Good Luck!
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Kelly Affonce
DeKeaff Exotics
AIM: DekeaffGrrl