Ive gone through it countless times. The key is to drink LOTS of water and cranberry juice(no cocktail, no sugar added). Add lemon to ur water, it helps break up the stones. Drinking more fluids will help aid on keeping ur ureter open, making the pathway for the stones smooth and easier(less pain for you while they pass). Hope that helps, take care.
I had them at 30 weeks the doc did nothing for me just gave me paracetamol and sent me home they took 3 weeks to pass and then I was fine it was painful just try to drink alot and use the toilet often and REST I hope they pass for you quickly coz I know they are so awful