Fruitcake, I LOVE running, it's essential for me to remain mentally-balanced and sane, like a natural anti-depressant :) I started getting problems as my mileage was increasing, and I actually really appreciate (Trigirl) the fluids every 1/2 hour thing. It makes a lot of sense to me now, and it's very helpful to have a benchmark like that!
That was a really nice, heartfelt post, Fruitcake :) I also agree in giving your body time to heal (to Trigirl). It took me a year to recover also. I wasn't able to exercise (or even walk) without fainting for five or so months. You're obviously putting up a good fight, just remember to give yourself time, like Fruitcake said. Just wanted to reiterate it. I really admire your strength as well, same with you Fruitcake.
Also, trigirl - I have arthritis too, and I read a NYT article a while ago that says you shouldn't take painkillers too soon before a run. Apparently it can actually be bad for your muscles. It talks about ibuprofen, not sure if acetaminophen is in the same category. Thought I'd share the link.
I used to take indocin for arthritis, but my doctor said it could interfere with asthma (believe it or not). So on the arthritis front, I'm not sure what to suggest (from personal experience, I mean).