Supplementing

I have to supplement with formula now, because I’ve come down with a sickness and it’s effecting my production, but I’m so afraid of giving my baby his very first bottle of formula. I don’t know if he’ll take it good, I got the formula specifically made for supplementing but I’m still afraid of it upsetting his stomach or making him sick. Other moms who had to supplement, did your baby take the first bottle of formula good?