Need some help please!?

i am so confused. i know you cant get pregnant unless you have . but me and my boyfriend have not had . i have done other things to him as well as him to me . but i am still freaking out that i could get pregnant. is it even possible? i have been really hungry lately lke i normally am when i get my period and sometimes i have cramp then it goes away but i am 2 days late... whats going on