Should I go on disability?

I'm a teacher, and I've been diagnosed with fibromyalgia, severe mixed sleep apnea, and am on the list for spinal surgery, to repair spondylolisthesis, and 4 crushed nerve roots.

For the first 7 months of school, I dragged myself in, when some days I could barely walk. Then, a couple of weeks ago, I was involved in an incident that I can only ascribe to fibro fog.

One of my junior high students asked me how long I thought I could hold a teaspoon of ground cinnamon in my mouth. I said "I don't know, indefinitely". They asked me if I would like to try, and I agreed. It didn't seem like a big deal, and after about 2 minutes I spit it out. Then the student asked if he could try it. He puked.

The school board told me that I couldn't return until I got a doctor's agreement that I was physically fit to teach. I saw a doctor two weeks ago, and she told me to take a couple of weeks off. I go for another appointment tomorrow, and depending on what I tell the doctor, may be off indefinitely on a disability leave.

Nothing has changed, I still am exhausted, sore everywhere, and having all kinds of nerve problems in my legs. But I would feel like a quitter if I took the disability. I'm just wondering what I should do.