Formula Switch

How / when did you know you needed to switch formula?

My son is almost 5 weeks old and has always been a naturally fussy baby. He can’t just “chill” and will cry whenever he isn’t eating basically. He normally eats 3-4oz every 2.5-3 hours but for the past few days has been crying during feedings or refusing to feed and continue to cry.

We’re currently on the yellow can of Enfamil and I’m considering giving Gentlease a try to see if it helps.

Have any of your LO’s been like this? This is my second and I feel useless because I can’t remember how it was with my first.