so i just realized that the lower part of my back (around my spine) feels like there is a bruise there but when i looked at it in the mirror, nothing was there. i dont remember doing any sort of activity to cause this pain, infact ive been off for a couple weeks now from swimming. but i was sitting/slouching weirldy in a chair and have been a little stressed lately and do try and pop my back frequently. i recently hit my hip on the corner of a counter top but that wouldnt have anything to do with it would it? i just want to make sure im okay and just over thinking things