Good luck w/ the doc. My same comment goes for Phentermine and other prescription " weight loss" drugs - whatever she had in mind I'm not sure. Its always good to get a full blood work up so you have a baseline on things like thyroid and adrenals. And then just stay focused on consistent diet & training. Trust me - as a competitor of 10 years and someone who has battled w/ a body that likes to build both fat & muscle easily, I've spent a lifetime looking for "the thing that will help" - and there is none. Diet, training, good quality sleep / managed stress levels, consistence, persistence & patience. And when you're not looking, the changes start to come. It is absolutely a lifestyle and your body is a perfect biochemical machine that wants to run as efficieintly as possibly, but we rarely fuel & exercise efficiently enough to allow it to do what it was designed for.
best of luck!