I agree with everyone else here.
In the days gone by
in history...people drank and smoked liked chimneys and for the most part their babies were blessedly fine. Tell you Doctor the deal.... you didn't know. Don't beat yourself up!!! Plus, if you really only did a few, the baby is probably fine. Even if you were doing more than you admitted there is a good chance the baby will be fine if you stop now.
Do see an OB/GYN as soon as possible before making any decisions on your own.