Eastern Fence Lizard bloated?

I have an Eastern Fence Lizard, but she seems to be extremely bloated. We don't think she's pregnant (we've had her for about six weeks) and we're a little worried that she might have some kind of disease. We've been feeding her mealworms and crickets (and occasionally some bugs we find outside), her tank is moved outside whenever it's sunny, and taken back in when it gets cold. And the tanks is also under a UV lamp. So is something drastically wrong with her? She's in a 15 gallon tank with 2 anoles and a skink, but they don't fight and we're moving them soon into a 30 gallon tank. We're just a little worried that she might die on us.