I am sure this all stems from childhood and the fact that you were a dancer/athlete from a young age. We are told to "suck it up" and keep going, right? So what that your toes are bleeding... gotta keep dancing. Power through the pain.
I am so sorry you were feeling crappy the past few days! Actually, I am a few days late reading this - we were sick this weekend and I didn't get much done which also stresses me the fuck out! I don't sit still often and it's hard for me unless I am writing or reading, still have to get up a thousand times throughout the day. So, I feel ya soul sista!
I cry over lots of things though. The last time I cried from physical pain I hit my funny bone SO hard on some metal in the garage and I couldn't feel my arm for an hour. Maybe I cried because I was freaked out though, who knows. Tears fall from theses eyes a lot!