Yes it is very harmful for your baby & if you care for your baby, then you should either stop smoking or abort the pregnancy.
Smoking anytime during pregnancy is dangerous, but is exceptionally so during the first three months. Some of the conditions in the child has been linked to smoking.
Besides active smoking, even passive exposure to smoke is dangerous during pregnancy. The mother-to-be should therefore ensure that she is not even around people who smoke, as far as possible.
It is very harm full for the baby .Very well said even i feel you should stop smoking .