C.M.
First I am an LPN and yes you could be pregnant, second you need to go get a test over the counter might still test negative or might not it just depends. Something that someone might not have told you was the shots are only progesterone. Most birth control pills have both progesterone and estrogen in them unless you take the mini pill which is then the progesterone only pill. I got pregnant on the minipill and my girlfriend had all four of her children while on the birth control shot. You should schedule an appointment with your doctor when you can.