Need Treatment For Sciatic Area Pain

I have been having severe (L) sciatic area pain that prevents me from sitting up to get up in the am. I have to roll out of the side of the bed. This has been ongoing 3-4 months. I do have DJD at multiple levels buts this is like no other pain I have had related to my lower back. I had a x-ray that shows Ovoid calcification lymph node overlying right lower abdomen as a incidental finding #1. I am very concerned have high history of family with RA, Lupus, Bone cancer, lung cancer, cervical cancer, CHF heart disease ,CAD, MI etc. I do have HTN, I do have fibromyalgia, neck surgery disectomy x s2. I have had bouts of low back going out but nothing like this. It is over sacrum (L) side I need some advise what I should do as far as calcification? or is there any concerns? Should I worry about my back as it is not low back its sacral... at witts end with pain