Hi,  By Federal law people with RSD automatically can receive SSI/SDI benefits.  I've had RSD for about 7 years, and it took 2 years to get benefits, but I also got back payments, and a lot of cash.  Please check into this.  I'm positive it will work for you.  I too spend many days in bed and couching it.  It helps to elevate my legs with a heating pad and Lidoderm patches.  I also take several pain meds.
  
 Sympathetic and empathetic,
  
 Sylvia