Never orgasmed

I'm only 15 but me and my boyfriend have sex almost everyday and his penis is not small at all. it feels really good but I'm a very small girl. sometimes it starts to hurt. but other times it feels really good but towards the end I feel like I have to pee and I make him stop even though I go pee right before we have sex because I know I'll have to pee during. is the peeing sensation me about to orgasm or is my body just not ready yet?