Depo shot, pregnancy??

question i had my depo shot for the 1st time last month the same day my period left i was just actually spotting, that was on August 29th, on sept 6th i had a leep done they did a pregnancy before and was negative but was still early to show up as positive, so i was crampy few times when i was supposed to get my period few days before i was crampy and spotting but idk if it was because i had the leep or it was implantation bleeding so i am currently 9days late and i've been feeling nauseous the past few days is it any chance i can be pregnant?? i just had a baby back in may :( i was doing pull out method untill i got the depo shot that same week i was having intercourse without protection, please anyone can help me??? lol im so lost!