Stress is a big factor on how intense your pain is. The burning could be a couple different things including spread. I get a mix of burning and a sometimes a feeling of running cold water. (like today it felt like ice water running down my right side.) Let's hope that you don't get any additional symptoms.

As far as your block. I to have right ankle rsd. (originally) and my last lsb was a set of 3; 1 week apart and it really helped decrease the pain and my toenails turned back to normal colors.