sciatica.hi im having all kinds of pain. starts in my tailbone and goes straight down my left side. if im on my feet too long my foot and legs swell up so bad i cant put my shoe on. i cant lay on either of my sides. i feel like something is poking my side from the inside out...if im on my feet or sitting for too long then the next day im in such intense pain i cant walk. i physically have to crawl to the bathroom. i cant stand long enough to have a shower or sit long enough to have a bath. painkillers dont make even a small difference. i have got hemmerhoids, and it hurts to pee. this all started after my back pain started. it gets worse with movement and gets really bad when i cough or sneeze. im always dizzy. what could be wrong?