So I am am truly at a loss, at 3 years old my daughter's doctor told me she was over weight and they wanted me to attend their healthy weight clinic, as a child I struggled with being over weight and my daughter's father is also very heavy, so I have always been very health conscious with her. We attended this clinic for 2 years, during that time we learned about healthy eating, food to avoid, exercises the whole 9, and I followed it to a T, I even had a food journal for her, I had hoped we were creating healthy habits but instead it created an obsession, when she was 5 we stopped going to the clinic because nothing was changing with her weight, she continued to get taller but also gained weight with the height and I felt at that point the clinic was no longer helping us, well now she's 7 and food has become a full blown obsession, all the time she complains that she's hungry she eats every chance she gets sometimes hiding food from me, last year I found out she was eating 2 breakfasts and 2 lunches every single day and lying to her teacher about eating at home, I've spoken with her Dr and while they are concerned about her weight they have no idea why she is hungry all the time and tell me I need to regulate her better, but I don't know what to do any more if anyone has any advice I am all ears and very grateful

Change your diet completely. Throw away all junk food from your house and offer her a healthy alternative. And when she's really hungry she'll eat whatever you put on the table.