this is my 3rd pregnancy and my tailbone has been very painful when I would lay down or try to get up since about 14 weeks, I figured its just pregnancy, with my 2nd pregnancy I had SPD but mainly in my pelvic bones, I had the hardest time just walking, severe pain. So I schedule physical therapy and here I have it once again! I was sooooo tight! my tailbone and pelvic floor was all crooked. im so glad I went in and got checked out. back to wearing my pregnancy belt again.