Breastfeeding while using marijuana/ciggs

Please don't judge, I used to be a daily smoker before getting pregnant. I stopped after I found out I was pregnant, I want to breastfeed baby for the first few months but I also know I'll be using either marijuana , ciggs or both . Will this affect my baby? I don't smoke every second of my life btw , marijuana maybe once a week and just 3-4 ciggs in a day. But I just don't know.