I had mirena inserted about 8 weeks after birth of my first child...

I had mirena inserted about 8 weeks after birth of my first child. First I weighed less then than I do now. I've had a loss of appetite and I exercise, in no way should I weigh what I do, I'm about 40 - 50 lbs overweight on a vegetarian diet. I have been having headaches, everyday, can't sleep, anxiety and depression which has absolutely had its effects on my marriage. The doctor tells me this is all because my body changed after having the baby, but I feel so bloated all the time and I'm actually wanting to have a period. I feel the restraint on my body, this is not normal. I'm having it taken out next week and we are going back to condoms.