The coccyx should be in line with the sacrum; mine was displaced to the rear from birthing Daniel's head.
I got a recommendation from my midwife, Regina, for a naturopathic doctor who does coccygeal adjustments to correct dislocation. She said that most women experience immediate relief from the adjustment, and any left-over soreness should then resolve. After the adjustment(s) I'm going to see the physical therapist who works with women who have pelvic injuries from birth.
I really hope this course of action makes everything feel better. Wish me luck!