Dry humped with boyfriend clothes, haven't had a period in 4 months, but not on birth control, can i get pregnant?

Yes but . . .: Lots of variables. It's unlikely that you got pregnant by dry humping with clothes on but if you've engaged in penile-vaginal sex w/o protection, then yes, you could get pregnant. Birth control pills/patches/rings help lower risk of pregnancy but it's best to also use condoms, too, to lower risk of getting/passing sexually transmitted disease/infection. Condoms must be worn each & every time.