Hello,
Welcome to the ehealthforum and I am really glad to help you out. What you are having is a teen pregnancy and it can definitely effect the baby. Incidence of premature birth and low birth weight is higher among adolescent mothers. Pregnancy at an early age may raise chances of anemia, preterm delivery, and low birth weight.
In teenage, underdeveloped pelvis can lead to difficulties in childbirth and an obstructed labor which can lead to eclampsia, obstetric fistula, infant mortality, or maternal mortality.
Eat well especially a healthy diet, take less of stress, take the prescribed vitamin supplements regularly and have regular antenatal checkups.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care.