First of all-- welcome to the forum!! I'm glad you decided to come out of ghost-mode and post... I did that myself for a while, just reading and taking things in, but now I am hooked on posting.
Anyway in response to the "how should I take this" question.. this is hard to say, because it's like asking "how should I feel about this." Everyone will react differently, and of course we have no way of knowing what the doctor meant by what she said. But just to let you know, I once went out shopping with my mom and we saw this beautiful woman at the checkout counter. The woman could have been a model, she had such a lovely face, but she would have been a plus sized model because she was a bigger girl-- but it looked really good on her, I thought. Anyway my mom (being the outgoing woman that she is) went right up to her and said "I'm sure people tell you this all the time, but you have the most beautiful face." The woman accepted the compliment graciously, and we left.
But afterwards the thought dawned on me: what if she took this as a backhanded compliment, because she was overweight? I mentioned it to my mom, and she was totally confused. "How can telling someone they are beautiful be an insult?" she said. She just didn't understand that this could be even remotely offensive.
Soo the moral of this story is, just like my mother, the doctor probably just meant to say that you are beautiful! She probably didn't even realize that the way she said it made it seem she was criticizing your body... especially if she is thin, and never struggled with her weight. Often such things make people insensitive to what may hurt our feelings.