I'm worried smh

I have a friend who just found she reciving an amazing gift (a baby) she is only 4 days past her missed AF but she smoked meth what are the chances it harmed the baby??? I'm so upset with her because I have been ttc for a long while and can't but she wasn't even trying and is pregnant I don't know if her smoking meth just one time would be harmful to the baby yet with her only being like 1-5 weeks pregnant ............................