Need help to which doctor to approach.

My son is 5 yrs old now. Still throwing tantrums usually at night. Before it was daily. Now sometimes specially when he missed afternoon sleep, which is very difficult to make him sleep. He used to shouts, kicks, punch, cry with tight shut eyes. Stiff whole body, Rubbing feets with each other, all this all of sudden at night. Maybe dream, can't figure out because he can't explains properly out of anger. And this last for 1-2 hrs may be more. It started like when his 2 yrs like we thought it will go away in time. But it's getting worst. No better. His showing habits..talking to himself... sometimes. And whenever touch ears or nose or feets with finger he blows them clean. Doesn't like to get wet. Hates all fruits and raw vegetables, or will vomit once he gets smell. This problem are ok but the tantrums at night is what are worried of. Is it any nerve issue. We can't figure out whom to approach to consult. Please advise. What to do. Thanks.