Neruo, thanks.

I was tested for ANA a few years ago by a rheumatologist and it was negative, not sure if ENA was ever tested. At the moment I'm thinking this may all have been from the NSAIDs. I talked with the tailbone doctor's office on Friday and they said if they weren't helping I could stop taking them, and they're going to schedule me in to see him sooner. I'm suspecting the NSAIDs because things started going downhill after I went to the doctor for my initial problems in January and got prescribed the NSAIDs for the first time. (Well, she gave me a steroid dosepack for 1 week first which made me feel much better, but then transitioned to NSAIDs after the dosepack was done.)
They've basically had me on one form or another of them since then and things just seem to stay the same or get worse. My dad can't take NSAIDs since he has a sensitivity that caused kidney damage when they gave them to him years ago, so while my kidneys are fine maybe I just have some kind of bad reaction to them. I also found a study that suggested there may be an interaction between NSAIDs and thyroid hormones, and in the past getting on the right thyroid meds was what fixed my joint pain so maybe it's just getting screwed up again. My thyroid labs were still in the normal range but just barely.
In any case, I stopped the NSAIDs, started taking a multivitamin (since that certainly can't hurt anything), and am hoping for the best. I'm considering also going off of birth control just to cut down the number of medications that might be doing anything negative to my system, but I would want to talk to my OBGYN before changing that. Feeling a bit better since stopping those pills on Friday so I'm hoping that was the whole problem. We'll see what the tailbone guy says. If the injections end up working for my feet, maybe I will go ahead with the tailbone cortisone injection too.