I have a pain in my right side of lower back. Stabbing pain sometimes radiates to stomach?

A number of causes. There are a number of different things this could be, from gallstones to gastritis to kidney stones. Push fluids, take Tylenol (acetaminophen) (if you can) and if your symptoms persist, see your physician. They will do an exam, check a urine sample, and decide on further testing based on the about findings.