Breastfeeding and smoking

Mary

I was a heavy smoker before i got pregnant I stopped in my pregnancy but hit a blunt a few times during the pregnancy stopped completely at about 32 weeks .... now im Breastfeeding and i smoke im wondering if it’ll harm baby or be in her system im in a state thats not legal yet ... Everybody tells me they Test Newborns or something in nc for weed but idk ? Am i harming my lo advice please