I am 21 Years old,(I Know I'm too Young for this), this is my second year married, and I'm still trying to get pregnant, I don't smoke, drink or anything, but my husband he smoke a lot more than 4 per day. I fallow my ovulation day and everything but still nothing, my doctor says that there isn't nothing wrong with me. I Just Want to know what could be the causes, why i don't get pregnant?