New to this

Hi I'm just new to this app I'm ttc baby number 4 , I have 3 children from my previous relationship but me and my partner are hoping to have one. I was using the depo injection up until June when we decided we would like to try  I just got my first period last month so starting using glow to help track my cycles I'm just hoping they not all over the place has any one else used depo  before and gotten pregnant so soon after ??