Smoking weed while pregnant

I’m 7 weeks pregnant and i’m having my fair share of morning sickness and nausea. I used to be high constantly but now because of concern of it harming the baby i’ve slowed down A LOT. I have smoked here and there and it most definitely helps with the nausea. But i’ve tried to do a little research and it says smoking weed could cause issues? Does anyone know anything about this?