Main Question: I just found out I am 4 weeks pregnant And have been drinking and smoking ( socially). Did I do any harm to my baby and am I at a greater cause for miscarriage?
The sooner you stop smoking and drinking, the better. Smoking, drinking alcohol, and using other drugs can be dangerous for your pregnancy and your future baby. Smoking increases the risk for serious health problems after your baby is born, as well as sudden infant death syndrome (SIDS). People who smoke also have higher rates of miscarriage than non-smokers.
At your prenatal visit, let your doctor or nurse know about your smoking and drinking and when you stopped so that they can help ensure you have a healthy pregnancy. Even though quitting can be hard, your doctor can help. And many Planned Parenthood health centers have programs to help you stop smoking. You can also call 1-800-QUIT-NOW (1-800-784-8669).