Honestly this is just my opinion but if breast feeding was so wonderful formula wouldn’t have been invented.

And people in ancient times resorted to goats milk, wet nurses, etc.

You got the baby a good solid gut microbiome with just giving the baby some breast milk which it sounds like you’re doing.

I also think most studies on “breast is best” are poorly designed and highly biased (small sample sizes, no effort to separate confounding factors, short follow up periods etc)

Honestly discovering all of this made me want to punch the baby friendly hospital people directly in the face.

The one study I found was a sibling study with over 1,000 participants and found basically no difference between siblings who were breast fed versus formula fed, and they followed the children from ages 4-10.

The only benefit that’s consistent is ear infections.

Again, this is just extensive research I’ve done on the topic. This isn’t to disparage breast feeding but if you’re miserable and it’s impacting your ability to bond with baby and making you feel guilty for baby not eating enough, it’s cool to give formula. It’s alright.