Veronica,
I sympathize with your situation. As a special ed teacher, I have often served on the child study teams at various schools, and these kinds of kids are the most difficult to help. Sometimes you actually get them at school long enough to begin to provide services, and then they move. Many people say I'm so wonderful because I teach special ed students, but you regular ed teachers also teach many kids with special needs, such as those SWO kids you mention. Teaching is a calling, not a job you can do 8 hours a day and walk away from. Usually we're working about 12 hours a day, and thinking about the kids every other waking minute. I'm lucky to have a husband who understands this--and understands why I need to go biking to maintain my sanity.
The solution for problems we have no control over: go for a ride, and keep on keeping on, because summer vacation comes!
My vacation started a week ago, and all of a sudden I can sleep at night! Your time is coming soon. Hang in there!
Jan