hi first and foremost dont fret what you are facing is a very normal phenomenon in almost all the ladies after birth a lot of your hormones change and so you get a lot of changes and mood swings amongst the lots of changes is heaviness of breasts as you secrete milk you develop irregular periods and you may gain weight i think just stick to your guns start gyming and maintaining a good diet that will get your weight back by the way also check your sugars mostly they would have checked it during child birth but sometimes they develop gestational diabetes too best of luck and again dont worry this is all part of normal physiology