After daycare...

My little girl is normally so good. Yeah she cries but not ridiculously. I started back full time and she goes to daycare now. She gets home every day and screams and cries and then when she's not doing that she just sleeps. She's never been a big sleeper (probably about 3 hrs during the day and she sleeps all night). She's also been very gassy which could account for the screaming as well. I feel like maybe the problem is they aren't letting her sleep during the day? Any other thoughts? I know the kids are loud and always trying to touch her etc... she's been her normal self on the weekends. I also wonder if they are mixing her formula correctly.. or switching it with another's baby's? She's on elecare for a cow milk protein intolerance. I feel like her stomach bothers her again.. ugh. Guess I'm not sure what I'm asking just difficult as barely anyone around here takes infants... so switching his not really an option.