Tom, my heart goes out to you. I've been in the same place, too, as have others here, as well. Try not to stress out, and, yes, I know that's not easy. As for what to do, you are the only one who can make the choice, but am hoping you have more options (about the job, and income), and that you check with the prospective employer (carefully), and factor in just what you can handle and what you can't.
We are always going to be here for you, and please be sure, it's not wrong to let us go along with you, week by week, or even day by day. I feel very strongly, myself, in wishing for the least possible hurt for you, and your loved ones. Get as much rest as you can, when you can !