B
I don't have a lot of knowledge of what you're going through but did have a difficult child with ADD (but wasn't diagnosed then) as a youngster who now has PTSD and ADHD. Nothing in comparison to your struggles. But what I do remember as a young Mom was a lot of sleepless nights, lots of crying by myself wondering how on earth were we ever going to get through it. This started even in Kindergarten. I remember praying and saying, Lord I don't even know how he's going to stand still in the entrance line to get into school in the morning. He was always zipping around here and there out of control. That was just the beginning and it was a long uphill battle. Many parent/teacher/principal conferences on his bad behavior.
My husband at the time was opposed to having him seen because he didn't want to have the stigma of any diagnosis put on him. I'll be honest, I didn't have much say so but kind of felt the same way (at the time). I feel like now, if I had just known what was going on with him I would have been in a better position to help. Instead I spent years and years what felt like beating my head against the wall with constant troubles and issues that just made him always look like a bad boy and me a bad mother who didn't know how to control him.
When you know better, you do better so I will try not to beat myself up. But now I clearly know that having knowledge about whatever "issue" it is we have, whether it's a child with mental and emotional issues, children/husbands/wives with alcoholism or drug addictions or addictions of any kind, moves us out of denial and secrecy.
I feel anything that is kept secret or hidden by temporarily fixing with some kind of gratification either by us (through our own perhaps, compulsive shopping, Obsessive Compulsive Disorder (OCD), overeating to name a few) or by temporarily gratifying the person with the problem by bribery with a toy, promises, or restrictions made when we are out of control, is only a band-aid on the problem.
I know you are "trying" to find out what B's issues are and based on the sounds of your determination, I think you will begin to find the answers. It may take time but you are opening the door and letting the light shine in. Keeping knocking on all doors until something opens up. Once you begin to "get answers" you can begin to put those actions into place for his healing and ultimately yours and the whole family.
Don't give up hope. God is watching out for you.