questioning about my doctor

So I have gone to the doctors office twice now about my weight concern. The doctor I have, is a lady. The past 2 times I have seen her she tells me the only way to lose the weight I want to lose is to go completely vegan, like no red meats, chicken, no dairy, no eggs, no nothing to do with animals. And the first time I saw her she told me to juice for 10 days and only juice, so I couldn't eat anything I just had to drink fruits and vegetables that I juice. And this last visit I had with her she told me I could either eat healthy and listen to what she says or could do surgery. I am a 18 year old female. And I have only just met this lady two times and she throws to me the idea of me having surgery. I'm really hesitating to make this next doctors appointment with this lady. Any thoughts or advice??