pregnancy?

my boyfriend & i had sex today. first things first im on birth control and have to go get another shot next month. we didnt use a condom & he cum on my hands but i think some when by my inner thigh. then i had to change out of my shorts because we had to go to my little cousin's party and when i got back home to put my shorts back on they had cum on them in the inside. is there a chance i can get pregnant? & PLEASE LEAVE YOUR RUDE COMMENTS TO YOURSELF I DONT NEED THEM I HAVE SO MANY PROBLEMS WITH MY PARENT 
update1- yes im on the depo shot & i need to get another one next month because this month is my last month 
update2- i have only be on since September on this year