We switched to a new formula, there have been copious spit ups (like a…

We switched to a new formula, there have been copious spit ups (like a little white water), has anyone experienced this? Is it normal? We're going to the pediatrician on Saturday, we'll wait a long time, I'm very worried. On the previous formula, she didn't spit up so much. We switched because of an allergy to the previous one, we introduced it abruptly, not gradually as it caused a lot of rash, we were constantly fussy for days, barely smiled and stopped sleeping due to itching. After the new formula, she calmed down, her hands don't pull towards her face as much, she sleeps much better now, we can play calmly and smile while doing it.