Oo, it's likely a mix, 4-year-olds really do need that consistent daytime presence, and the schedule change probably confused her a bit, lalo na kung she's used to you being around. A few of us mums went through the same thing when we shifted to night shift work, at talagang napansin namin na mas kumukulit at mas nag-act out ang kids during those times kasi they feel the change in routine, hindi lang exhaustion lang. What helped sa amin was creating really solid anchor activities with her during your awake hours, even just 30 mins of focused play or a consistent snack routine together, para ramdam siya na present ka pa rin, at maybe talk to your doc or a child psychologist kung it continues kasi sometimes there's more going on emotionally, especially at that age. Hugs, ito talaga challenging season ng parenting pero makikita mo, it's not a forever thing once she adjusts.