I'm not a doctor so I can't recommend what you should do. I'm just describing what I did.
Maybe it had an effect on my situation.
Re: calcium ... I've read many conflicting things about what foods are good/bad. There seemed to be a consensus that calcium tablets or supplements are not helpful and could contribute to stone growth. Apparently, the calcium must be from a natural source (milk, cheese, etc.) before it has benefit. My urologist talked down vitamin C in the same way -- natural source=YES, tablets=NO. With my diabetes/low-carb diet, this becomes a challenge since I stay away from milk and juices. Again, this is all relevant if you have or make calcium oxalate stones.
Yes, conflicting information. The attending physician at my Emergency event recommended I drink plenty of liquids ... not just water but something with good electrolytes ... like black tea. A few days later, my GP told me about his favourite web site ( http://www.webmd.com/kidney-stones/understanding-kidney-stones-prevention ) that suggests avoiding black tea. To further fuel the fire, the Mayo Clinic site ( http://www.mayoclinic.com/health/kidney-stones/DS00282/DSECTION=alternative-medicine ) says black or green tea "could reduce the risk of kidney stones." On that same page; entitled Alternative Medicine by the way; you will note some information about orange and lemon juice use ('juice use' ).
Googling 'low oxalate diet' will give you many more confusions -- I even found a page that specifically supported vitamin C as the number one way to avoid stone formation. I filed that one with the wacky YouTube lemon juice drinking guy.
Then there's coffee -- I've read that coffee is a culprit, that it's actually the caffeine that's bad and that it's OK to drink ???
I'm getting a Google headache -- is there a Migraine Forum around here?
P.S. No stones on the x-ray? ... Great news