We've decided to introduce formula in addition to breastfeeding, mostly because I'm losing my sanity.

I really wanted to exclusively breastfeed/pump but I feel very overwhelmed knowing I'll be solely responsible for feeding my baby. My husband sees the stress I'm under and brought it up to me. What kind of formula does everyone use in addition to breastmilk? I still want my baby to get the benefits of nursing/pumping so just looking to complement it. I received free samples of enfamil for supplementing so was going to start with that.