Re: poop ?
Maybe the tea is giving you more foremilk? Maybe try just nursing on one side per feeding so he gets his dessert?
My DS has dairy issues, and in the process of hammering that out someone commented that foremilk/hindmilk imbalance can mimic a sensitivity to dairy. Since it just started with the tea I would start there.
Grateful mama to one Jedi (2001), one Hobbit (2004), one crooner (2010), and one rebel (2013).