When I Wake Up In The Morning's I Have Butt

when i wake up in the morning's i have butt and back of leg pain i find it hard to roll over went to doctor was told it was sicatic but i been hurting for a year and a half now really feels worse after i lay down and try to get up and walk when i sit down i have a lot of pain in the bottom of my butt and top part of back of my leg some times it feels like i have a bad sun burn and someone hits me in the butt with a stick