Hey PaneJane69
I too am a regional FA, however the most sectors we do are 5. I have to say i praise any regional FA who has to do 6 sectors, because thats really pushing it. I know by my fifth sector i am starting to do silly little things wrong as fatigue is setting in big time.
The only advice i can give you is try to remember all the good things you love about the job and take that with you to work each day.
Keep smiling
P.S Remember their are worse jobs