This is an interesting thread, I'm glad she got that one to pass! Seems like the store owners didn't know jack poop. She also may have gotten preggo from being kept with a male.. I could see that happening since that pet store doesn't seem very knowledgeable.
For now I'd leave her be. Sometimes females don't want to lay until they are completely left alone. I'd take a peak at her tomorrow night to see her progress. You did excellent on getting her to pass that egg! I hope she passes the others with ease.