Hey Kelly,
I guess most of us feel that way. I know what you are gong through. All I can stay is hang in there. Things have got to get better...right. Sounds like you are at the bottom. Have you talked to any type of therapist? Maybe someone there can help.
By the way, I have been looking for a job since last April been on 9 interviews and sent out over 60+ resumes to businesses... so I know it is tough