I've had two lithotripsies but never had kidney stones while pregnant. For those unbearable, middle-of-the-night pains, the urologist told advised to take hot baths, as hot as I could tolerate. So I would soak for 5-10 minutes, until it gave enough relief to be able to fall asleep. Although, with your pregnancy, I don't know if your doctor would give the same advice. Perhaps a heating pad would give you some comfort. Hope that you pass the stones soon, or that the pain doesn't increase. I can only imagine how much worse the stones must feel whilst preggo. Hugs to you!