Smoking marijuana whike breastfeeding

I do not want to be judged because I stopped smoking the day I took a positive pregnancy test and had my son over a month ago and haven't touched anything. I've only pumped ahead of time once to have a couple drinks at a wedding I went to last week but other than that haven't even drank since December. I am wondering if anyone knows how long THC remains in breast milk and if or when it would be safe to breastfeed if I were to smoke a little.