Alcohol and conceiving

Out of sheer curiosity, can drinking limit the chances of conceiving? We all know that drinking too much can lead to unwanted pregnancies, but is there a such thing of drinking prohibiting you from actually getting pregnant? Also, what are the chances of something being wrong with baby if you aren’t aware that you’re pregnant, and you’re still drinking. I am currently not pregnant before anyone gets worked up over that last question, I’ve taken multiple tests and they’re all negative.