It might be too that everyone just needs to be patient. A change like this will take a while to adjust to. And their behaviour changes might seem exaggerated to you because of the guilt you are feeling, so you automatically link any bad behaviour to the separation, but perhaps the acting out is not always because of the adjustment. I know because I've been there, blamed myself for any time they were upset when it was more often over other things age appropriate like growth spurt, general tiredness, too much sugar, etc, all those other things that effects kids behaviour. Sounds like you are trying your best and that's all that matters.