I have not run since Dec 31. It's been about 10 days. So my toe actually feels great now. There is minimal pain. My back is not hurting anymore. I believe this is because I have not been running. Although, I have been doing core work. I read an article in February's Runner's World that gives 5-6 lower back and abdominal exercises. I have been doing them every day or at least every other day. It discussed that lower back pain following long runs results from a weak core. I admit I only do crushes 2-3 times a week. If I do these better exercises I should be golden. I have not given up hope on Boston yet. I will wait for the x-ray result and if I don't have a fracture I will start to run next week.