Good Afternoon. I woke up this morning with pain in my lower back (tailbone area). It is a tight, sharp pain. As the day has progressed I am noticing the pain has moved higher up. and has been felt down the back of my legs. It hurts when I walk. I am fighting walking in a hunched posture. It still hurts when I sit but not nearly as bad. I did not have this yesterday. My period is due in a couple days. I have noticed back pain occurring with the onset of my cycle the last several months. This is more severe though. My back was not bothering me at all yesterday so I am a little concerned. Any ideas? Thank you!!