prenatal pills, marijuana while pregnant.

Ok. So I haven't been taking my prenatal pills in the last month.. they make me so sick, nauseas, headaches, sometimes I even vomit  i watch what I eat and my baby is very healthy and has a strong heartbeat with me not taking the pills. But I was also wondering is it bad to smoke marijuana while pregnant? Before I was pregnant it helped me with my sleeping and eating because I have a very weak appetite and now it's all just worse with being pregnant. I have done a lot of research on the subject and have not found anything about it being bad. Are there any mommies out there that smoke or smoked marijuana while pregnant? Has there been any complications or anything if you did? Please let me know.