back pain..

so i work 8 hour shifts standing all day in a busy deli. im kept goin non stop. by the time i get home all i want to do is lie down but the minute i lie down i get the worst pain in my lower back ever. i literally cant move on the bed withoit gettin a shooting pain. cant turn side to side or im nearly in tears any movememt at all kills me really and to try and get back off the bed is even worse. when i try to stand i get a shooting pain down my left leg up my lower back. anyone go through anything similar or know anything that will help?