We had unprotected sex we did it from behind but we think that she also got some sperm inside we are not too sure can she get pregnet?
When you say you had unprotected sex from behind, are you talking anal or vaginal? Either way, pregnancy could happen. If you had unprotected anal intercourse and you ejaculated, semen can run out of the anus when you withdraw and find it's way to her vaginal opening, there fore pregnancy is possible.
If it was vaginal, i don't think i have to explain that one.
If it was vaginal, i don't think i have to explain that one.