I had sex, sunday he pulled out but he came on my back & we think it slid down to my vagina, so we got plan b (aftera on tuesday) you think im pregnat?

Unlikely: First, always, ALWAYS use a comdom. Wait 2 weeks and do home pregnancy test on first morning urine. If negative, repeat in 7 to 10 days. If both negative, unlikely you are pregnant.

Doubtful: If you used Plan B One Step same day as you had sex and Aftera two days later. You don't need to use two different emergency contraceptives. One is fine.