Aww, first time mommy worries are real talaga! White-ish poop at that age can be normal (especially with formula), pero since it's consistently tagos sa diaper and may texture na parang off, mas okay na ikonsulta mo talaga with your pediatrician para ma-check if it's just the mix feeding adjustment or something else, better safe kaysa sorry, hindi ba? One of my mum friends had similar concerns at 4 months with her mixed fed baby, and turned out it was just the formula brand triggering sensitive digestion, pero kailangan pa rin ma-assess ng doc to be sure. Keep an eye on kung may iba pang signs like fussiness, bloating, or fever, kaya dun mo ma-trigger agad ang checkup. You're doing great reaching out, mamsh!