Hi, I've Had Some Hip Pain, Mostly Severe That Has

Hi, I've had some hip pain, mostly severe that has been getting worse over the last year or two. I thought that I needed to see my chiropractor for a back alignment and have been going there quite regularly, but it doesn't seem to have much effect. The pain is mostly at night, laying on my right side (which I can't do) or when I'm sitting or more important, when I'm riding or driving a vehicle. I thought it might be a pinched nerve? and possible still do. I have not talked with my doctor, but have been trying to take care of it myself, but the pain is becoming unbearable when riding in a vehicle or sleeping at night. Taking Avil, Ibuprofen, etc... does not seem to help at all. Ice/heat doesn't do very much either. I do have slight relief when I put some pressure on an area when laying down or riding in the vehicle... such as pushing down on the joint. Any suggestions, before I go to my doctor?
Thanks, J. Koch