Okay so I had my first depo shot on Aug 27 2016 the nurse that gave me my depo shot saidthat I had to go back on Nov 27 to get my second depo shot. I had gone a little bit earlier cause I realized my next appointment landed on a Sunday and I just wanted to know if I had to take it a day before or a day after since they don't open on sundays I went back on Nov 23 And when I arrived the other nurse told me I was suppose to get the shot on Nov 19? it didn t make sense to me since the first nurse that had given me my depo shot said I had my appointment on the 27th of nov? I had unprotected sex on the 22 of nov. what are my chances of getting pregnant if I only had one depo shot?