BF smokes and it bothers me

My bf has smoked heavy cigarettes for 20 years now. I used to smoke but stopped about a year before getting pregnant. I asked him to smoke outside the house because it makes me feel nauseous. We live in a one bedroom apartment btw. He says I’m using my pregnancy as an excuse to be a bitch. This mad me cry and I told him he was being mean and inconsiderate.Wow! I know I’m not being unreasonable, he is being a di**. I just needed to vent I haven’t even announced my pregnancy to anyone yet and I’m feeling very disappointed in his behavior.