I am so sorry to hear about all the stress and junk you have to put up with. I know, somewhat, because I have loads of things driving me nuts. It started about 5 years ago when I had a "medical accident" and then the roof fell in. If you want to read about this time in my life, you can go to my site and read my profile. It may encourage you or inspire you or, possibly, depress you a bit.
Right now, I have to put dressings, kotex pads or diapers on my right leg because my body is leaking fluids right through the skin. It's called lymphedema. My lymph nodes died in the lower leg during my "medical accident" and the body does not know how to get rid of them ... so they leak through the skin. Yuk! So, rather than to go on and on, you can see that I understand a great deal of how you feel.
Don't let your family discourage you. You know, you can't tell them anything they don't want to hear. Do you have a "significant other" in your life? Does he let you draw on his strength during times of trouble? It's always great when you have someone near and dear to give you a big hug.
If you quit your job, do you have a means to support yourself? You might want to consider applying for Social Security Disability with the help of your DR. I did and they approved it the first application. No appeal necessary. That's not always the case, though. My ex co-worker applied and fought with them for 2 years and finally won before a judge panel. Maybe that's the way for you to go.
Again, try not to let your family get to you. It only bugs you because you love them. Take care and let me/us know how you are faring.
Lois La Rose