Cow’s milk allergy

Cass

So recently doc thinks baby has cows milk allergy so we switched to similac soy. Had some constipation that seems to

Be clearing up but now baby isn’t sleeping at all during the day unless it’s on my chest or falling asleep and waking up screaming like 10min later

and during feedings she is fussy and squirmy and seems almost in pain. Any ideas?

We’re using Mylicon already also