depends on if your close to ovulation, but just lay off the drinks and ciggs for now just incase. you likelyness of being pregnant depends where you arein your personal af calander, and if you dont get your af then take a test and fine out . good luck
well, since you had unprotected sex, you may well be pregnant. are your periods usually regular? you are most fertile 12-14 days before your next period is due to start. this means chances are very high. if it was a few days before or after a period, the chances are slimmer but thats not saying you definately are not. are you trying? smoking and drinking will affect baby but a one off should not cause too much damage, just stop (or try) until you know if you are pregnant or not as to give baby the best start.
If you were in the fertile time of your cycle, then you have about a 20% chance of pregnancy when you have unprotected sex. Drinking and smoking the day of the sex will not affect the baby, because the egg is still floating around loose in your uterus that day. But being a smoker can have negative effects on your health in general, which affects all aspects of your body to the negative, and of course drinking or smoking when pregnant will affect the baby once it is indeed implanted and getting its blood supply from you.