Lipo worked great, 5 months later, I have more fat than pre-op?

I went from 129# to 170 after taking prednisone for a head injury. I began seeing a weight management physician, started Phentermine and a 900-1200 cal meal plan. I work with a plastic surgeon who did abdominal, thigh, back roll Lipo in April removing 3500 cc. My stomach was FLAT, I was super happy. I now have more fat than pre-op in my abdomen and thighs. Tons of labs done, all WNL. I'm frustrated and getting depressed. He's offered to do Lipo again, I fear it'll be the same result. Any advice?