Drink plenty of water or 100% cranberry juice it help me a lot I just had my check up to see if I still had an infection and it went away
Unfortunately they can't do much for kidney stones when you're pregnant. But you need to make sure you're not still battling an infection. And don't just let them "guess" that its probably a kidney stone. They can do ultrasounds to make sure it's not other problems. I had an ultrasound that showed my kidney was swollen and they also did a special x-ray to try to see if the baby or stones were causing it. Which, they still didn't give me an answer on the cause 100% but they at least determined it wasn't bad enough to require surgical removal of a stone or an artificial drain for my kidney, and simply kept in the hospital and with pain meds till the baby or stone moved and the pain issue -which was debilitating- lessened and I could function again. Get it checked, drink plenty of water, and feel better.
I've had kidney stones 4 times with this pregnancy and the first stone (6 mm) needed to be removed surgically. I was on pain meds my whole first trimester and part of my second. They can help you if they deem it necessary. That's assuming you can't control pain with tylenol or something stronger like a percocet or if the stone is too large to pass and/or is causing hudronephrosis. I hope you pass it though. They are not fun at all =/