Find a new doctor.
First, you aren't overweight.
Second, this doctor is completely out line for several reasons. As your OB/GYN he knows of your loss earlier this year. He should be far more sensitive to your feelings. More, unless he has a real medical concern that he is addressing (such as diabetes, etc) your weight isn't his concern. Finally, for all he knows you are a recoving bulemic/anorexic. A comment like this could send someone in that position into a vicious relapse.
I would strongly encourage you to find a doctor who has a more empathetic bed side manner. Just because someone has an MD behind their name doesn't mean they can say whatever they want to you!!
:) -- btw, 135 is great and I bet you look wonderful. Hugs to you.