I gave my exclusively breastfed baby some formula today. She didn’t drink a ton of it. I’ve given her formula mixed with breast milk in the past too. But today she projectile threw up maybe an hour after I gave it to her. I also heated her up a bottle of breast milk not long after that because she seemed fussy and hungry. She ate the whole bottle. Then threw up. She didn’t seem bothered or fussy before she threw up or during. And she’s smiling and such. Is this normal? I’m currently nursing her right now and she’s fallen asleep on my breast.