A few months after weaning my son off of breastmilk at one year of age, I finally started my period, for the first time since before I was pregnant. Now I'm getting my period every two weeks - one week on and one week off, and so it goes. What's wrong with me? I'm not overweight. I am 29 years old. THis is my first child and first pregnancy. I breastfed for one year and never had any spotting or bleeding during that year. I am not on any hormones and do not want to be. I tried the DEPO shot shortly after giving birth, but it's been 9 months since my last dose was due and I did not get that shot 9 months ago.