Okay... I am 17 years old me and my boyfriend had our beautiful daughter 4months ago I was breastfeeding I stopped after two months. My period returned a month after she was born whilst I was breastfeeding I have had 4periods since and have noticed my cycle is now 36days... I have not got pregnant me and my boyfriend have had unprotected sex everyday and still no pregnancy? I am scared that I might be suffering second infertility or how long does fertility to return after birth?? Someone please tell me there is a reason 