Hi, KissAmeGal

I am sorry that you are having such a difficult time with all of this. One suggestion that I would make is that you think about taking your son off the Concerta and Zoloft since stimulants and SSRI's can worsten Bipolar. It sounds as if your son's main symptoms are frustration and anger as well as some impulsiveness that is landing him into trouble and I personally, from my own experience with my daughter exhibiting similar symptoms, have found when they are put on one of the atypical antipsychotics such as Risperdal, Seroquel, or Geodon that there is some improvement. Out of the three I would highly recommend the Seroquel since that has worked wonderfully for my daughter in terms of curbing the anger, frustration and impulsivity. My daughter was running away from home, self harming, cutting classes, and many other impulsive acts and in addition to that getting so angry and agitated at home in which she flew off the handle about almost anything or everything that was said or asked of her. Without the proper diagnosis she was treated as if she were depressed and put on Zoloft for her depression and Concerta for the impulsivity borderline ADD that they thought she had. This only worstened her condition which threw her into a second suicide attempt and some mania. It wasn't until they started her on the Risperdal that we saw improvement but since she developed some side effects from that they changed her to Seroquel which works very much in the same way in terms of addressing the anger and impulsivity. They added a mood stabilizer, Lamictal, which is geared more towards the depressive side of Bipolar and the two ended up being a wonderful combo for us.
Often they say it is best to treat the Bipolar first and then address the ADD because often once the Bipolar is stabilized with the right meds, there is no need to add any for the ADD since the symptoms are taken care of once the Bipolar is under control OR perhaps the ADD was misdiagnosed.
I would recommend that you sit down with your son when he is calm and tell him that you love him and that something is definitely wrong and that together you will find the way to make him feel better. Tell him that you promise that you will find the right meds to make him feel better and that often it is like a game of Yahtzee when it comes to doing so....but eventuallly like you get the right roll of the dice you will find the right combo of meds.
I have found that once I was able to give my daughter the hope that she needed to know that things would get better it was easier for her to work with me in order to get there.
Our kids rely on us to be a strong fortress that is confident and able to withstand what ever comes our way. One of our therapists once told me how important it was for me to be strong because our children look to their parents as being their pillar of strength and when we look as if we are not able to go through with it they start to lose hope in there being a light at the end of that tunnel. This has helped me in being that source of strength for my daughter as I hope it will allow you to be for your son.
Hang in there....educate yourself and go with your strong motherly instincts because nobody knows their child better than a mom does.
(((HUGS))) and positive vibes from one mom to another ~ Goody