Yes ut can affect baby by cutting off oxygen which can cause deformities, brain damage, and puts you at an extreme risk for preterm labor (can be as early as 30wks). Baby can get jaundice from
smoking mothers, and have breathing problems. Some babys end up in NICU care for as much as 3 months after birth. Those are just a few risks to baby. You are putting yourself at risk for preeclampsia (high blood pressure). Thats the only risk I can think of right now to you, it mostly could harm your baby.