Feeling Overwhelmed

OK, so, I have been wrestling with this issue with my son. His behavior has become more erratic lately. His teacher at school went out on maternity leave and he has a sub. It is also toward the end of the year, so his schedule is thrown off and he doesn't deal well with that. But all that aside, I just keep thinking about this diagnosis---yeah, the one we have not gotten yet. I keep thinking, is there something I could have done differently when I was pregnant? Why him and not me or my husband or my oldest son? I guess we really never will know why, and cannot really question that. This is the way it is and we just have to move on from there. All we can do is pray for guidance I guess. Enough ranting for now.