I have it severely now and have been on crutches for the past month, which is good as it takes the weight off.
I do see a physio and have a massage weekly. It's very painful at the time but at least I seem to get a good sleep that night.
As for the pain when you move, take it very slowly and clench your pelvic floor muscles and buttocks, it helps to stabilise everything and reduce the pain.
Another tip, put a plastic shopping bag on your car seat to help you get in and out easier.
HTH...