Sandy,
Go to the place where they did the CT Scan and request your medical record. That "should" tell you what size these three kidney stones are and if they are passable.
Kidney stones cause pain. Unless they are sitting perfectly still, they cause pain. When they are in the kidney, trying to go down the ureter, in the bladder or trying to come out....they cause pain.
It sounds like you are doing all that one can do. Read all that you can and learn all you can about kidney stones. Thats about all the advice I can give. Now, find out about how big those stones are.
Debbie