My fiance and i are trying to conceive but he drinks everyday not like a lot mostly whiskey with pepsi or something everyday how bad does it hurtsperm?

He needs to stop: using alcohol if he is serious about being a father. People who drink everyday are at high risk of drinking too much, and I am not sure what "not a lot" means, and unless you see what he is pouring into his drink you may not really have any idea about what he is consuming either. Alcohol reduces sperm count, motility and the number of normal sperm, and he is harming your chances of conceiving.