Yeah, I'm watching my Mom deteriorate. She can barely move ...can't walk in the grass for the "holes" which means she's no strength in her ankles to compensate for the smallest deviation in the yard surface. It's hard ... I have to fix her house, the GF's rental, my house + raise my son. Sometimes you just have to take a breath and take it slow ... write things down on a list, get a calendar going. Above all, try not to get too engrossed in everyone's issues - you can't afford to get sick or have problems of your own as it looks like they're all depending on you ... or will be in the not so distant future.
One day at a time is all you can do. Watch a movie, clean the house ... do mindless things to keep you going.