If your DH will continue to work, will your working another 12 months make all that much difference? I'd say, spend a few months looking on the outside and see what sort of reaction you get. If nothing pans out and nothing changes for the better at your current workplace, then re-evaluate leaving with only 10 months left.
One reality for many older folks who are looking for a job change is that potential new employers may have reservations, fearing you will not stay long enough to make a contribution or being over qualified and unhappy with what they have to offer should you be looking for something less stressful responsibilty wise.
Doing things today that others won't, to do things tomorrow that others can't. Of course I'm referring to workouts, not robbing banks.