My child is 1.5 month old. I am feeding her nan pro infant formula 1 as my breast milk is almost negligible. But she is having upset stomach. She farts and then cry a lot. Her poop is green and grey. She somtimes vomits.and also simetimes she cry constantly . What should I do? I gave her 2 spoon of water to help her digest infant milk formula. This helped her a lot and stopes crying. What should I do?