How long did you supplement?

Baby boy dropped weight again. We got him to birth weight with supplementing with formula after breastfeeding. We then went one week with just breastfeeding and did a weight check—he lost 4oz and was supposed to gain 5oz so now approx 9oz behind.

We now are to offer 2oz of formula after each breastfeed.

I feel so defeated and too tired to pump after every feed.

How long did other mamas have to supplement for? Is there an end? He’s 3 weeks but born 3 weeks early. Today’s his due date.