Biting/hitting when excited?

by Lyn
(California)

This might not make much sense, sorry.

My son is 2 1/2. I have had many issues with him since he turned a year old. He hit all his milestones within "normal" range, but I have always always felt like something wasn't right. I've spoke to the pediatrician but get blown off saying it's behavior and discipline. I even expressed my concern of sensory issues.
My son has no regulation of emotion. He is extremely active and cannot sit still. In public, he goes from extremely friendly to screaming melt down because someone looked at him or "it's too loud". Noise is HUGE. I can tell he's getting worked up because he'll hold my hand and start swinging himself, hanging on me. He won't wear clothes and often sits crying all.day.long. I could go on and on...

I know a lot of these could be SPD or high sensitivity but is biting and anxiety part of this too or is this something different? Is this not SPD at all?

I can't play with him because when he gets excited he will suddenly punch me in the face or bite me until I bleed. When he starts getting excited, he giggles and kicks and punches. He's not being mean, but it's almost like he's so full of emotion that he's got to get it out somehow. He bites his nails down until they hurt and he seems to worry about everything or everything bothers him, cue excessive crying!!

I'm so incredibly frustrated and tired of being told I need to discipline him more or need parenting classes. Someone please tell me I'm not crazy. That this isn't "normal" behavior...

Thanks