Crancky child evry time. To cause?

Hi My child is 2 years 3 months old. Overactive and restless. His weight is 11.9 kg from last 1 year. His weight range from last 1 years 11-12 kg. Doesn't grow his weight. His height is taller than his ages child. He has tantrum problems, don't know from where does it come. I was not  crancky as he. He throw objects hit himself every time. Hit head in floor or wall. He doesn't listen to anyone when become fussy. The atmosphere become so bad like querral between adults. He doesn't coperate with us. He lies on floor hit head on floor but not hard because he knows he will injure still he hits slowly cry. If left him alone keep crying for 15-20 minites. And he doesn't want to leave breast milk. Tried n number of methods. But wasteful. He cries and shout. This is major and serious issue for us . He is out of control. He doesn't speak well. He speaks only 10-12 words. Rest keep babbling . He doesn't eat healthy. He doesn't sleep well. need guidance and what blood test require to cause