I have a bad hernia after baby #2 (big baby). This can cause me to have back pain, especially if I have to stand all day.
My back pain is nothing like yours. I bought a "Squeem". It helped my back a lot. It also keeps my midsection warm. I don't normally wear it alot anymore. Since I started back skating, my back has grown stronger. But, my hernia is still there. The doctor, literally, pushed my inards back inside! When he did that, I felt his hands go inside my stomach muscles. I am going to get the hernia fixed, but probably in April or May.