P.P.
You know..
I think you have a few things going on at once here. He is a typical 2 so, when he wants something.. he wants it NOW and the throwing toy thing sure does get attention right away, its negative but he is getting attention for it. I would continue carving out dad/mom and me time with him where you are focusing just on him. I know its so hard with the baby and I'm sure you are tired from just having the baby.It doesn't have to be hours at a time.
I would continue to be loving and firm and let him know the hitting is not acceptable. Maybe when you all are busy with the baby.. you could have a little bag of surprises just for him.. like playdough.. or something that he can get busy with and entertain himself.THe homemade kind is the best.. I teach 2's and they just LOVE IT! It has soothed the wildest beast.. ha..
I'm sure you read to him at night and play with him in the bathtub.You all are adjusting to all of the new routines and I'm sure he senses that.. its a transition. 2's really love their structure and routine and I'm sure things are sort of up in the air with the new baby and he is just letting you all know that he doesn't care for it and misses being the center of attention. See if you can track any patterns in his meltdowns.. and try to give him other things to occupy him with, like blocks.. playdough.. a little movie on tv.. a favorite treat to eat.. so he feels he is getting something too.. not your attention at that moment.. but something nice.
Remember.. he is still young and I'm sure his language is still developing and he may not always be able to express his needs appropriately. You are his role model and teaching him what is right and wrong is just part of our parenting territory..the time outs if short (no more than a minute or two.. that is all that really registers at this age..)
and used without you losing your temper..or hitting him.. and as non emotional as possible are very appropriate.
hard when you have been up all night with the baby. I'm sure. Try and get out and do some things for you too new mommy! His phase will pass.
well.. hope this helps a little. You are doing a great job.. keep up the great work.