we were blessed with a baby boy on 4th Jan 2016. Since then, I have been breast feeding to my baby till date. I got my first period on 4th august 2016. I thought that second period would be on 2nd-4th Sept, so we had an unprotected sex. Is there any chance of pregnant again ? When,by date, I should test it with the pregnancy test kit if required ? We are not ready for second child so soon... Please advise.