Post op and post partum

i had Gastric bypass in January 2013, got pregnant unexpectedly in jam 2014, I had a beautiful baby girl in September. At first I lost weight couldnt eat anything. Then I was always starving. I would wake up at 2am so hungry that my stomach was cramping. I gained 50lbs!!!! I just lost 80lbs last year! I'm traumatized, I have 20lbs more to loose to get back to my pre pregnancy weight but i'm stuck at 150lbs. I have back and hip injuries that make exercse really dificult because of an injury from Iraq. I dont know what to do to get back to my  prepregnancy weight. 

Any help or advice? 

I am in the same boat. I lost 100 lbs from rny , I delivered end of November. I gained about 50 lbs, lost 20 within 2 days of delivering, and am still 30 lbs over my original weight.

i feel like a failure for this. I tracked my calories and averaged between 1600-1800 a day thru protein shakes and constant little snacks. That is not a caloric intake to make one gain 30 lbs??

what is your plan of attack