Advice needed on chronic pain!

For the past 5 years, I have dealt with chronic pain, muscle spams, and weakness. Doctors believe it could possibly be an autoimmune disorder, but also haven't totally ruled out MS. This has been a total physical assault on my body, not to mention a mental drain. I haven't been able to come to terms with the fact that my life may never be the same again. I find myself cancelling plans because I just don't feel good. This has taken a toll on my relationship with family and friends, and even affected my work. For those of you with chronic illness, how do you cope? What are your motivations to help get you through the day? What keeps you going? Have you found any natural remedies or stress relievers to help ease pain and anxiety associated with chronic illness? How do you handle your bad days? I have more bad days then good, and am looking for some inspiration to help ease my mind.