Haven't we been here before?

I suddenly find myself in a position where I am hating, really hating, my job again. It largely stems from part of my role, which starting as a minor part, and has now almost engulfed the entire job. Basically its not a particularly enjoyable thing to do, and it doesn't make me popular with the students. Considering that the vast majority of my working life involves interaction with students, this is a Big Thing.

I've started drinking more again. A lot more, the bottle of red to myself every night kind of more.
I know it isn't helping matters, but I've got myself trapped in that place.

Naturally I have been applying for alternative employment, and I have my fingers crossed over a couple of possibilities, but many of them involve a quite serious pay cut. Paying for the habit is one thing, I can always kick that if necessary, but finding it tough to pay the mortgage is something else.

That said, I am tempted to simply hand in my notice on Monday, and deal with the consequences later. Maybe get a few temping jobs to pay the bills and see what happens after that, but I just don't know.