I've had great luck with Jim Bain of Wells Fargo in Woburn, MA. He'll take an indepth look at your situation and give you a clearer idea of what loan products are out there and what if any actions can be done to improve any mis-information on your credit reports.
I always tell buyers to ask friends, family, colleagues for referrals of mortgage professionals they've used and had a positive experience with. Then also investigate the people, google them, the better business bureau, Mass Division of Banks, Attorney Generals Office etc. Then ask for the mortgage professionals resume as well as refrences, most will be glad to furnish this info.
Hope that helps,