yes that dress DOES make you look fat. ok?
If a doc told me I had a little one...it'd be a "male bonding" thing (unless it was a lady doc :-)
You may think it counterproductive but it is certainly PERFECTLY within a doctors rights to say "lose weight or it will KILL you". Its up to you to figure out all your inner demons and how to accomplish the objective. The doc can provide advice, referal, sample diet plans or whatever.
It is the doctors DUTY to inform you about your health issues. This lady was completely out of line in complaining about it.