Hang in there on this...get things checked out. If there is any problems then these tests were a silver lining for you to catch something early (should there be any problems, hopefully there aren't). Otherwise, as your Doc said your dietary changes should turn things around for you ;-) That and the fact that you are now aware that in the past there was a problem.
I'm really glad to hear your W is talking more with you. I really do believe she's starting to see your consistency at work...and the fact that you made a Dr. appt, and followed-through w/it shows you are really taking this seriously. It's just another action backing up your words.
