Need advice quick - Green Iguana laid eggs

[DOBERMAN]

So my girlfriends green iguana just laid over 20 eggs on top of her hide.
The thing is, this whole time we have had "her" we thought she was a male! It was adopted back in June from a guy who had lots of reptiles so we just assumed the sex he told us was correct. It has not had any contact with any iguana's since we got her and I believe it was the only iguana he had so I'm not sure how she would have got pregnant. This is new to us so I had a few questions and am really wondering what I should do next. Now I've maybe heard somewhere some types of reptiles can carry sperm inside them for a long time to use later on....? Will these eggs even be fertilized? She is laying on them and they are getting compressed. Not to mention some of her claws are pricking them too. She doesn't want us near her and I would really like to know what the next step is. Any and all help is much appreciated.