Raven, sorry to hear you are having such pain. I, too, am VERY tired these days as well. The coming of Spring is never fun for me physically (neither is Fall, come to think of it). I work, take care of the kids, and go to bed. The house is a complete dump because of it. To make things worse, everyone is sick passing bugs back and forth for the last few weeks and I've finally come down with it as well. i need the ecnomy sized bottle of lysol.
As for working, this is the longest I've been able to hold down a job in 10 years (18 months). This is mainly for a few reasons, I'm able to work from home a few days a week and I flex my time when I don't feel well w/o them knowing I'm having health issues (unless i'm just down right sick and take the day off). Being a contracter, I also was able to take 6 weeks of vacation time last year to help give my body breaks throughout the year (of course, if they hire me, that'll be history). This particular job I have does have down time and is much less stressful overall than my previous ones. Needless to say, even with all that, my husband and I saving our pennies knowing that I could be out of work sick unable to work again (or just laid off) at any given moment.
Hang in there.