Green poop 🤢

So my son has had consistently green poop for the past several days and I don't know why. He is breastfed, has never had formula except a couple times in the hospital. He is 7 weeks old. I haven't changed anything in my diet or in the way he feeds. I can't figure out if it is an imbalance of hindmilk and foremilk, or a diary intolerance, or what. I am going off of dairy for the next week or so to see if that makes a difference. Could chocolate cause this?? I have been eating lots of Reeses so that's really the only thing I have done differently. Haha 🤣 what else could be causing this? I read it could possibly be an infection. Otherwise I wouldn't be worried at all because I know green is in the normal range. It's just weird because his poop used to be bright yellow but now it's bright green!