Ok here are some good questions to ask you.
1) Did you receive a package of loan disclosures explaining loan terms, rates, and estimated fees?
2) To obtain this pre-approval did you supply income documentation? Or was your loan a stated income loan? (not likely with your household income)
3) Do you know your loan terms, payment, do you know about locking your rate, do you know if your loan is an arm or a fixed rate?
More than happy to answer questions and give you a non-biased opinion suited to your needs. Email or call me if you need to ask questions or just run things by me that do not look right or do not make sense.