My boyfriend inserted some length of his penis inside me for just twice after a gap of few minutes but he took out because it bled and hurt badly. are there any chances that i may get pregnant ?

Sperm: it takes but one sperm to fertilize an egg. There are plenty of sperm in the pre-ejaculatory secreations of the penis. Therefore, if the sperm got in the vagina you could get pregnant. In simple terms: penis + vagina - birth control = pregnancy.

No ejaculation??: the penetration will not make you pregnant ,if this this your first time, by penetrating he broke your hymen, and that what made you bleed and have pain. but if he did ejaculate inside you then there is good chance you could end up pregnant. but if this is not your first time ,then he might cause some tear inside, or you did not use any lubrication, so the friction cause pain and bleeding.