What Causes Shooting Pain In The Hip?
Not sciatic nerve
This would not be your sciatic nerve. That nerve comes out of a "notch" in part of your buttock muscle and then travels down your leg. It won't send pain upward.
If your pain is severe or getting worse, then I highly recommend that you go in to be seen. Muscular strain is more likely to cause a spasm or knot although a warm bath helping may go with it being muscular. But it could also be pain from the colon, pancreas, or kidney.
If you are able to recreate the pain by using a particular muscle, or by touching the area, that may mean a muscular injury. But if the pain is deeper and not related to using certain muscle groups, then you should go in to be seen now. The doctor can examine to try to locate the source of the pain and also get imaging studies.
But in answer to your question: this is not related to your sciatic nerve.
I do have a lot of digestive issues though. Is it possible it could be diverticulitis?
Yes, it is definitely possible to be diverticulitis. Regarding the kidneys, a kidney stone can produce pain that is in the back and abdomen on the same side.
The only way to know for sure is to be examined by a physician, which will help with locating the area and X-rays or ultrasound.
I would not expect a sudden onset of pain like you are describing from kidney failure. Kidney function can be tested with a blood test (BUN and creatinine) and with a urinalysis to start with. If there are any abnormalities with these, then further testing would be done according to what these tests show.