Pale yellow poop sa 2 months old ay usually normal lalo na kung breastfed lang siya, kasi that's the typical color ng breast milk poop, kind of like mustard or pale yellow talaga! Pero if it's super pale (like whitish or grayish), or if may other signs like baby seems lethargic, hindi kumakain well, or may fever, better check with your pedia na para sure, dahil sometimes that can be a sign of something else na kailangan i-address. A few of my mum friends had the same worry and their babies were totally fine, pero alam mo naman, peace of mind is important so don't hesitate to ask your doctor!