It's a strange thing to say, but I'm "glad" I fell that day. If I hadn't I probably would have simply gone to make a doctors' appointment on Monday and had no answers as to what the underlying problem with my back was, but instead I was able to get an answer as to what was wrong and, more importantly, tips on how to heal and prevent this from happening in the future.
Turns out I had a bulging spinal disc (like a herniated disc but less severe) right at the base of my spine (between the S1 and L5 vertebrae) which was causing the pain. The cure? WALK. Walking helps stretch and strengthen the muscles in my back so slow, short, gentle walks and working up to normal speed and length. And to prevent it in the future he just suggested normal walks and light yoga--totally doable! And probably better for my health, too, I had been a bad girl and fell out of my normal walking habit.
Sooo yeah, that's it! I'm alive, I'm feeling better, I'm walking entirely on my own and at normal speeds for normal lengths. And I guess I'm gettin' into yoga! :-) Any videos or tips you can share with me?