Your doctor knows what he's doing,,that in itself is a relief. What youve experienced does indeed sound like a stone,,buttttttttttttt...........Heres teh deal.

Ct scans wont show alot of things.....Due to variances,,,hidden fold of skin, tissue etc.....He needs to check for crystals using an iv drip for stones.

Keep this in mind please! Protein, blood, and pain.............Is indicative of pre existing, progressive incurable kidney disease.....So it is of the utmost importance that in lets say,,,,3 weeks you are rechecked and no blood is found,,and protein level is lowered. If not,,,,you need referral to nephrologist.

Good luck,,been there/ done this!

Thanks for answering my question about kidneys and back pain.
I'll keep that in mind what you said.