My back hates me...

I've been down for three days now. Today I had to take the garbage out. It wasn't that heavy but I had to make three trips. By the time I was done and had rolled the bins to the curb I was shaking so badly I could hardly stand in my feet.
It's not a piercing pain, unless I twist just right or sit in one position too long then try to move, but it is every muscle from my rib cage to the top of my thighs twisted into hard knots, particularly the muscles around the pelvic girdle. The SI joint is throwing a hissy fit. For two days I've been stretching and doing my physical therapy exercises 5-10 times a day but it doesn't seem to be helping. I can't get comfortable and even the hot tub doesn't seem to help. Naproxen and Tylenol are onboard and flexeril the first night but not since- it makes me sleep all day and is depressive.
I saw the chiropractor on Monday which seems to have precipitated this- not that it was good then or I wouldn't have been there. I can't go back because it's an hour's drive and $80 away.
I don't know what to do at this point. *sigh*