Is it normal to still feel pregnant after you've had a baby?

It's not like I feel a baby in there because I am not pregnant.(Have checked with pregnancy tests) My daughter is coming up on being a year old and I still have swollen feet and ankles, you can see in my face that I still retain water, I still have heartburn and I still have not had a period. I can assume that the lack of menstrual cycle is due to birth control. It just bugs me that I can only wear sandals and I feel like I have high blood pressure. Yes I am overweight but I weigh as much as I did before I had my daughter and I never had swollen feet then. Has anyone else had these problems a year after giving birth and what can I do to fix it.