Oh dear, I'm so sorry for what you're going through.

I've had very similar struggles with both my kids, but especially my son. Your guy is most definitely going to need some sort of medication. But also, he still needs to be held accountable for his actions so carefully consider how you're dealing with his misbehavior. With my son, for instance, he loses TV, computer and video game priveleges for a day or a week, depending on what he's done. Also, by the same token, we focus on a good behavior that we want to see more of and when he's reached a goal he earns a special reward like a new toy, special outing, movie night, etc. Since I got really strict with this, both ways, his behavior has improved dramatically.

Hang in there until you can get to the psych doc. Keep reaching out to folks here and to your friends and family for support.