Suggest Remedy To Relieve Back Pain

past 3 to 4 weeks i started having sharp pains in my back (but more to the right side), some days it was there, then would be gone the next. As weeks and days went by the pain increased, and was more daily and constant, it also starting radiating up below my right scapula, and around my right side, to my front below the right side of my ribs. I had blood tests done and an ultrasound - abdomin (upper). The doctor thinks I have shingles, but I have no rash, and the ultrasound showed an enlarged liver. my pain in now both front and back, and increases with most any movement I do (standing, walking, bending, twisting..etc). the pain is less, and more of a dull pain when laying down. my doctor gave me norco for the pain, but wants me to take acyclovir for shingles, but this medication caused my mom to have kidney failure about 3 months ago, and I'm affraid to take, since the ultrasound also shows I have an enlarged kidney to. Could the enlarged liver cause pain, by putting pressure under my rib cage, causing back and front pain when making movements. (when moving the pain is about a 7 to 9) 10 being the worst, and about a 5-6 when laying down. I heard there is a blood test for shingles, but alot of my problem, is I have no insurance or income to take a lot of test or get treatment. I feel the problem is more with my liver. I am obese, but have lost about 30 lbs since the pain started. I was at 416, and now at 386, but without dieting, with the abdominal pain, I'm just not hungry that much any more, sorry for typing so much...