Good to hear your golf ball is an almond in time it will be no more.
When people go on fasts I always test one component of ureas from urine to indicate when to stop.Over doing a fast robs the body of nutrients past that point. So I say short juice fasts for 2-3 days are the best for all; using the juices that are most apprioiate for you health condition.Asparagus tea is great for kidney function and cleansing as well as parsley,oatstraw.
Renal colic can cause those symtoms you mentioned.