Is there a possibilty of working from home? Or how about a wheel chair? If you were in a chair most of the day would that ease some of your pain and allow your wounds to heal?
Being the only one to work is frustrating and it sounds like she is projecting her frustration about it onto you. Being belittled doesn't help depression and not having supportive people in your life makes you feel alone. From my experience pretending like everything is ok isn't the most ideal way to handle it. I put on a mask and pretended like I was fine. When things got bad, I would throw myself into work and school and try to ride out the bad patches. I qouldnt tell my wife and she felt very rejected when I didn't pay attention to her and I would constantly work. Thankfully I have a supportive wife, and when I finally did open up about all of it she was willing to be there for me. Having someone in my life that I can openly talk to and get support from makes things more bearable and keeps me connected and feeling alive.