Hi. Welcome. Sorry to hear you are struggling with your son. I feel your pain. I have a 5 yr. old son and a 9 yr. old son, both diagnosed with bipolar disorder (bpd). Your son sounds like a carbon copy of my two boys. Nobody would believe the chaos unless they live it.
Many of the behaviors you describe are those of a child with bpd. Get back to a good pediatric psychiatrist - an M.D. They can do an evaluation for you. What ever the problem is it is a relief to have a name for "it".
Our pediatrician told me he wanted to put my son on risperdal when he was five. I am an RN and knew something about the medication and was not happy with that suggestion. I took my son to a group that did an evaluation but I was not convinced they fully understood what was going on. I finally found a psychiatrist who specialized in pediatrics. I did my own research. I knew before I ever got to the psychiatrist what the diagnosis would be. I was ready for the blow but I had hoped I was wrong. Alas, I was not wrong but we started meds. right away. Guess what was the first line med? Risperdal. It was like a miracle! The rages that lasted for an hour or more, the aggression, the anger, the night terrors (horrid, vivid, gory dreams), the reckless behavior, the sadness and despair... it all started to dissipate. Other meds were added, taken away, more added, doses adjusted all in an effort to reach the illusive nirvana called stability.
Shortly after I had the older boy in to the doc for his diagnosis my youngest son turned 3. Less than a week after his 3rd birthday he picked up a plastic toy screw driver and tried to stab me with it. He was like a demon! He was so angry, aggressive and then like a zombie. No emotion. He was not catatonic just walking like in a trance. I was so frightened I called the psychiatrist. I asked her what were the chances of having two children with bpd. The response was "extremely high" with bpd on both sides of the family. Both my husband and I have a brother that are mentally ill. I am sure both of them have bpd but neither will seek help. Their lives are messy and they live under their potentials. Another sad story.
I can only tell you that what you see now will not go away. If this is bpd the symptoms will worsen. The behaviors will progress. Children present with bpd differently than adults. They are usually cycling between manic and depressed moods frequently - several times a day. Their poor brains are so overloaded. They become very irritable and aggressive.
Get to your doctor and get some help.
I will be glad to share more information with you. I will be glad to listen to you and your wife. I have been there and this is a crisis most of us are ill prepared to face and deal with. I wish I had a penny for every tear I have shed. Support is so important for you. Let me know if there is anything I can do.
My prayers and thoughts are with you!