my daughter was happy all day yesterday.. played well.. ate well.. fed well

. but at night she gets up crying at d top of her voice every half n hr or 1... she doesnt wanna open her eye n look at me.. she doesnt wana feed.. jus cry n cry.i  dono y.. she s fyn in d mrng nw.. wat cud b d reason.. there s climate change.. its damn cold.. cud it b coz f dat??