purple or yellow enfamil ?

starla

So i’m not producing no where near as much milk for my 2 week old as i did the first week. i was making 10 oz in 10 minutes from pumping and now i can barley get 3 oz in the 15 min of pumping!! and he’s eating 4 oz every 3-4 hours not sure why i’m losing my supply but i was looking to supplement it with formula. Wanted to know you guys’ experience on the yellow and purple enfamil. i heard it was the closest formula to breast milk and i’m so scared to mess up his stomach as i’m a FTM. Just need help deciding which one to try first for him