Suggest Remedy For Pain On The Buttocks

I FELL 2 WKS AGO ON BUTT AND AND UP THE WHOLE RIGHT SIDE OF BODY. ER VISIT SAID CONTUSION OF SACRUM AREA. HAS GOTTEN SOMEWHAT BETTER BUT SOME DAYS IT IS VERY PAINFUL TO CLIMB STEPS AND STAND. RIDING IN A VEHICLE CAUSES GREAT PAIN AFTER. STILL NOT ABLE TO DRIVE. CAN T PUT FULL WEIGHT ON AREA. HAVE TO SIT AT AN ANGLE. THE PAIN IN ON RIGHT SIDE OF BUTT CRACK/SACRUM AREA. HOW LONG BEFORE IT WILL BE COMFORTABLE ENOUGH TO SIT, RIDE OR EVEN LAY ON BACKSIDE AGAIN?