Marijuana and pregnancy

So I smoked before I knew I was pregnant. Only one blunt a day normally at night after a long day because I work 7 days a week so at the end of my day I smoke and it helps me relax and sleep through the night. Anywho I just wonder could it possibly affect the baby since I smoke probably the first 5 weeks because I didn’t know I did feel bad and at the time I felt better once I smoked so just thought maybe that’s what I needed or something but those first couple weeks are the most critical I’m just worried I know some ppl who smoked while pregnant but just something I choose not to do no judgment to any who does but what do you guys think