Kick up the bum what was yours......

Hi all, I have been to a Weight Loss Clinic today at the hospital, I was forwarded by my GP 2 mths ago. I went to my GP looking for a magic tablet or something similiar. He then asked me if I had every throught of gastric bypass surgery. I nearly fell of the chair. I knew I was overweight but never thought I was that big. 17 stone at the time. Well the very next day I started my diet and today going to the WLC at hospital I weight 2 stone (28lbs) lighter. The Dr there said that my BMI even at my heaviest was not high enough for surgery but if I would have carried on gaining weight then who know's what would have happened. I told them I was using MFP app and they said great. I asked about the dreaded 1200 cals and she said as long as my net doesn't go below 1200 then everything would be fine and my body would need a lot less to go into the stavation mode everyone talks about. I don't have to go anymore as the kick up the bum from my own GP was enough. However he has asked if I would go back in 4 mths just to ensure my weight hasn't go back up.