What do you do when diet and exercise aren't creating weight loss? I had to change my diet a lot for acid reflux and food sensitivities last year, and I started exercising regularly at the beginning of the year. I only lost weight when on a medication (phentermine) but I felt like I was having a low-key heart attack every day so I stopped it. haven't lost a pound since. I feel more energetic and flexible but excess fat hasn't changed. I don't know what to do...