Ds2 is 15 months old, hes always been quite an easy baby, slept pretty well 2 naps a day and went down ok at night. He walked at 11 months and has been happy to toddle around endlessly amusing himself a really happy smiley boy. Recently though hes becoming very difficult, hes ALWAYS wants held and screams and screams if i put him down, sobbing. He runs around the room throwing himself into things, furniture, doors, walls, us sometimes head first and really hard, it hurts when he does it to us, he dosnt stop no matter how many times hes told he just blanks me. He constantly touching things, button on tv, trying to get into wires and cupboards hes even figured out the lock, i can tell him and remove him 200 times but hes keeps going back, if i shout to stop he blanks me completely. Hes been ill with vomiting bug recently and now wont sleep, hes screams in his cot after sleeping 15 mins with tiredness but wont resettle, hes went from waking at 7.30am to 5am and wont settle, im feeling rather stressed, his older brother has sensory needs so im exhausted, is this just his age?