Glad to hear you got a new appointment. Try not to focus on the shortcomings of the old doc with the new doc. Just let them know you would like a different opinion and go from there. Tara gave you great advice. PM me if you would like more help with this. I have lots of experience to help you out.
ETA: Check out this site. Jonah & THe Whale Foundation, Inc. - Home
All info there is great...also see the Mother's corner
Good advice for when dealing with difficult diagnosis and doctors. You want to avoid being labeled - a doctor seeking mother and get her the care/treatments necessary.