I just found out that my boyfriend (the baby's father) takes drugs in his system. He takes cocaine.
I want to know if that will affect my baby by my pregnancy, and how?
I'm not sure I know. The only ways I can think it would was if the cocaine damaged the sperm that got you pregnant (unlikely), or you were around when he was snorting and you inhaled some yourself.
The bigger point is that it will definitely affect your baby to have an addicted father. You might consider changing him to just a "sperm donor" until he has been totally clean (no slips) for at least six months; your baby does not need this stuff in his/her life, and you are the one who will need to protect the baby.
-- Cynthia, CNM. PhD.