The problem I am seeing here is that this seems to be affecting your health. You really have to relax and as was said try to be patient. At this point it is out of your control. It is not worth it to make yourself physically ill. The snake will return if and when it wants to. The majority seem to be found, even after a long while. Rarely do these stories turn out for the worst.
I do not want to sound mean, but this does seem like a bit of an extreme reaction, and you may need help, outside of this board, to relax and get perspective. I see it a lot in my line of work where people worry themselves into the hospital over things they cannot control.