This is EXACTLY what happened to my husband, word for word, last month. It was a slipped disk. With a chiropractor visit every day, muscle relaxers and pain meds,he was able to at least move around better in about 4 days, but he was off work (he's a paramedic so lots of lifting) for almost a month. Get to a chiro and a Doctor (for Rx) ASAP, and I hope you feel better soon!!