Dd about two weeks ds about 2 and a half. Have tried since birth to give him lots of one to one attention when I can and be patient loving and firm but problems.
He has been shouting at me screaming, shoving and hitting me when I am holding dd and generally being very hard work. Refusing now to sit on naughty step which had been a very useful cool down mechanism, whines incessantly at me for videos all the time and refuses to eat.
This morning he lunged at me while holding dd refused to stop and in the chaos hit his head on door, no harm done but has frightened me.
Getting to the end of my tether - we have never smacked himm and hope never to but there have been a few moments when I almost have 
Any advice on strategies how to deal?