What causes back pain under right rib cage?

[kabo60]

I am a 66 yr. old female, 5'5" tall weighing 140 lbs. and in good health until Sept. 2016 when I started experiencing some symptoms like lightheadedness, dizziness, shortness of breath. My BP runs low, usually around 92/64. Then in late October I had a severe UTI with blood in the urine. I attribute this to contamination from frequent rectal bleeding that I thought was from hemorrhoids. I started experiencing back pain in the kidney area, so I went to the ER and they did a CT scan that showed I had diverticulosis but no kidney infection. My PCP ordered a colonoscopy which found a benign polyp that was removed. I started juicing and even did a parasite cleanse which helped somewhat, but didn't fully decrease the back pain. Still had some rectal bleeding. Around the holidays my diet was compromised  by sugar and lots of refined foods, and I felt worse. Weak, lightheaded, shortness of breath and constipated again. An EKG was normal, chest x-ray normal, an ultrasound did not reveal any kidney stones or gall stones, but liver enzymes were elevated. Two subsequent blood tests showed liver enzymes continued to elevate. My PCP wanted me to go back to the gastroenterologist, but first I went on a strict diet for 3 weeks as part of a fast, eating no meat, animal by-products, sugar or grains. Two days after the fast ended, I ate some chicken and rice. The next morning, I awoke with back pain under my right rib cage which makes it difficult to roll over in bed. I also had this same pain several months ago before the fast. It is much worse lying down. I was feeling pretty good on the fast except for feeling weak some times, so I ate black beans to get some protein, but felt I needed more energy so when the fast ended, I ate some rotisserie chicken. (I also had some birthday cake with ice cream). I don't want to be a vegetarian because I feel like my body does need animal protein at times. My blood type is A+.

[kabo60]

A couple of other things...I had bloods tests to check for Hepatitis, mono, CMV  and thyroid and they all came back normal. But liver enzymes were still very elevated.