My daughter doctor just switched my daughter back to a milk based formula(she may be lactose intolerant) since she been switched she has this rash around her mouth.. also spits up curdled formula.. has anyone else had this happen when switching formulas? She only drinks 1-2oz and sleeps for 30mins and screams until she burps and puked then she’ll eat again and it’s this way all day, she is now at the point she won’t even take the bottle, she screams.. I gave her the one the doctors took her off, and she’ll take that one, she was only switched because of Wic.. she was on a lactose free formula but Wic doesn’t cover it so they witched her to gentle less one until she tries the ones they do.. she is 2months old and 8lbs.. do I call her doctor tomorrow and get an appointment or what do I do? This is the first time formula feeding her since she was born.. she wasn’t gaining weight so i stopped breastfeeding.. she is also a preemie..