Hi, welcome. Two books that really helped me were "the explosive child" and "the bipolar child". The first really helped me to not try and tackle everything at once. The second has a great chart in it for tracking moods, sleep, energy level, medications, ect... All on one chart. And it seemed to describe my son at that age. He also had mood swings, seperation anxiety, very clingy. Taking your son to a neuropysch to rule out things like bipolar or autism would be good. Some of the medications can make bipolar worse.
Just so you know he won't be able to hold it together much longer in school. The work load increases and the social expectations increase so that by 4th grade kids that could hold it together before sometimes can't anymore. If he doesn't have one already you might want to get started on getting him an IEP. The teachers all think I'm crazy at first when I insist on a behavor plan for difficult child 1, but by the end of the school year they are glad to have it.
