See a doctor, right away. Getting prenatal care early in a pregnancy is one of the best ways to prevent any health problems for you and your baby.

Your gynecologist can help you craft a healthy diet and exercise plan. This is very important, since everything you eat, drink, inhale or ingest goes from you to your baby. So you want to make sure you’re only putting healthy food in your body. You also need to get the right amounts of protein, calcium and vitamin C. Stay away from junk food, fatty foods and too much sugar. Too much of this stuff can cause serious health problems for you and your baby.

And, you want to stay away from harmful stuff, like cigarettes, alcohol and drugs. You also have to be careful with medicine, diet sodas, chemicals, household cleaners and varnishes. These can also cause birth defects and increase the chances of having a miscarriage.

Your gynecologist can give you a list of things to avoid and prescribe prenatal vitamins. If you see any other doctors for other health problems, make sure they know you’re pregnant. Some prescription medications and medical procedures are harmful to pregnant women.

Your doctor will also monitor you throughout the pregnancy for any potential problems. Teen girls are especially at risk for problems during pregnancy, since their bodies are often still developing.