my daughter is 3 weeks old, she was on enfamil formula and the last 2 weeks on similac. Now she is super fussy, gasy, sounds like she is congested (have clean her nose and throat plenty and no sign of anything), spits up, and even constipated. not sure if this a formula issue or not. I've tried feeing her more, give her gripe water and adding more water to her formula and no relief. I'm getting desperate for help. there has been no sleep happening in this house.

I'm starting to feel bad about not breastfeeding and consider trying again. my only issue is that last time I tried the baby wouldn't latch on right, she was already used to bottle feeding thanks to nicu. plus I'm not producing much now.

Advice.