hi, my toodler was having colic when she was 3 days borned, then I use to feed her with Similac total comfort hypoallergenic (less lactose), she seems like feel more comfortable after it. But recently i found out her poo is sticky & she seems like hard to push, She is now 3 months & 2 weeks. I wonder can i change the formula milk from hypoallergenic to normal but do i need to consider of less lactose for her formula milk product?