Suddenly won’t take formula

Bexar got sick a week or so ago. Ever since he’s slowly been taking less and less formula, more boob. For the last three days: won’t take formula at all.

We started supplementing with Earths Best, then switched to Hippe. We ran out of Hippe, so I got Earths Best again. Now he won’t eat it.

Normally I’d be jumping for joy because I want to still be breastfeeding and the supplementing happened to due a stint in the hospital (dehydration on my end)...but my brothers wedding is this weekend and now I’m scared he won’t eat while I’m at the Hen & Stage.

Suggestions? The Hippe formula is coming!