unfortunately many women with severe pelvic trauma and Myofascial Pelvic Pain Syndrome describe symptoms very similar to yours, including constant deep pelvic pain, extremely tight pelvic floor muscles, muscle spasms, trembling or shaking from pain and nervous system overload, difficulty sitting or walking comfortably, and the feeling that the body is constantly “guarding” itself after injury, especially after fractures involving the pelvis or sacrum, because trauma to the pelvic floor can cause muscles, fascia and nerves to become chronically irritated and overactive long after the bones themselves heal, so while your experience is absolutely severe and exhausting, it is not unheard of in people who have had major pelvic injuries, and many patients eventually require a combination of pelvic floor physical therapy, nerve pain treatment, muscle relaxers, trauma-informed rehabilitation and sometimes pain management specialists to get symptoms under better control.