Yeh it is all linked, give it time Hun, I had physio for a while when I got knocked off my push bike

You not being able to touch ur toes doesn't surprise me, ur hamstrings are tight which may be causing posture problems, that then is causing muscles to be tight, causing the pain, sry if that was a bit long winded

Get the physio, if he hasn't already to do some deep tissue massage, it'll hurt like hell but it will free up the locked/tight muscles, it worked a treat for me when I knocked my pelvis out from the accident