prevacid and green poop?

DD is 12 weeks today and has been on prevacid 7.5 mg daily since Wed. I have noticed since then (and especially recently that she has gone from one yellow seedy breastmilk poop a day to 2-4 green seedy poops. Is this typical? The NP who put us on prevacid had no info at all. From what I’ve read today she is a) on the wrong dose b) I was told it could be given with feedings etc so she is getting it at the wrong times and c) I was told to give it all at once (but have been splitting it so she is getting a 1/4 solutab twice a day-it made more sense to me as a nurse and she is much better on it). OHY. I guess I am concerned because I wonder if she is developing a foremilk imbalance-but I haven’t changed how I nurse her at all….