My little girl is 10 days old via c section . She was originally using ready to feed bottles ( enfamil newborn) for the first 7 days since it was easier while recovering. She was doing good. she had some gas but nothing major and didn't seem to be affected by it. Once home and unpacked we got out the baby breeze formula machine and poured purified water into it woth powdered formula and have been using that since. For the past 2 or 3 days she seems to be straining with gas and pooping seems hard for her. She poops green sometimes and brown with like little balls at times. She has had a hard time sleeping as she seems to just not feel good. I am unsure if it's the formula being too thick or the water ? Should I try to switch the gentleease formula? Any advice ? Ready to go bottles are expensive and wic doesn't provide them unfortunately

Pic for attention and help.