Ah, at 2 weeks and 3 days pa lang, ang poop ng formula-fed babies ay dapat yellowish to tan-colored and pasty or slightly runny, totally normal yan! The color and consistency can change throughout the day din, especially since she's still adjusting to the formula, so hindi ka mag-alala kung minsan mas makulay or mas maingay lang.
That said, kung may unusual color (like pure white, black, or may blood), very hard stools, or kung parang uncomfortable siya palagi, mas okay na i-check with her pediatrician just to be sure lahat ay okay lang talaga. Ang aking friends naman and I, we always observe kung paano ang feeding habits and diaper output nila, ganyan talaga ang first month, sobrang maraming questions!