Rule 1. Don't get down-there are plenty of us wish we were in your situation (believe me).
Rule 2. Keep sending CVs. I read only yesterday that Flybe are looking for F/Os and will consider low hours guys.
Rule 3. Don't be afraid to write to all the top guys chief pilots etc: you only need one to say, this guy has some front-let's see him!
Keep at it-tomorrow is always a new day and the interview and offer might be just around the next corner!