question: Hello, I have a lower back pain. It seems as though once a month, the shape of my lower spine changes. Instead of curving towards my pelvis, it points sharply straight down causing acute pain. Usually the pain will subside after a couple of days, but it s been almost a week. I am the mom of 3 year old twins. I did have a c-section but no specific traumatic back event. I am still breast feeding and don t want to contaminate the milk with drugs or X-rays. Any suggestions?