Waiting for results from vet

Paul took a urine sample up to the vet's.  Will have an answer tomorrow morning.  she has blood in her urine (easy to see in the snow.)  I am worried, although we seem to go through this twice a year.  She gets bladder infections and has to go on antibiotics.  She has crystals in her urine/kidneys and is on special dog food that we can only get from the vet.  But I am worried that this may be kidney stones and I feel awful as I know she is at the very least uncomfortable and possibly in pain.  Paul picked up antibiotics, and if this is an infection, (which is what it was in the past), then she should hopefully be clearing up/feeling better in a few days.  We have to keep her on this for a month.  $100 for the antibiotics.  Waiting to see what the vet says tomorrow on the urine analysis. 
Fingers crossed and saying my prayers.