should a 42 yr old woman get pregnant or not?

United States
@ruthinian (2311)
February 22, 2008 9:51am CST
I'm 42 yr old and just got married recently. I have no child of my own but I am raising a 6 yr. old autistic boy from my hubby's failed relationship. The boy is his third kid. The first two children (both girls, working and in a relationship too) from his first marriage are both normal. He smokes pots until now... his boy's mother is a druggy and a bi-polar. I am afraid that if I get pregnant my own child will also be abnormal since my hubby still do pot every now and then. Will it affect my child if we decided to have a new baby?