You're going to need a bigger tank than a 10 gallon. Sounds like it was just the temps being too low. If it happens again, or she doesn't perk up try giving her a warm bath to get her temperature up, but also if she's impacted and you give her a slightly warm bath and "massage" her stomach, then you might be able to feel the impaction, or it'll help her poo a little easier. My beardie almost always poos in her baths, even if she's already poo'd that day. I swear she just likes to watch me clean up after her...