My 2 yr baby is overthinking about her new sister and mother.. And bcz of that she is suffering from fever its effecting her psychologically that her little sister is getting more attentions.. Its ultimately effects her psychological health.. Even if I say her not to do some xyz things then after few hours she is suffering from.fever and always she is asking assurance whether I love her or not.. She is becoming over sensitive am worried.. How to deal with her..