Pain is really scary when you're pregnant, but it doesn't sound like it's anything that harming your baby (just you... yay?
). As for kidney stones, I've never had one myself but I've seen several people in the throws of them. As was said above, they tend to be quite painful and the pain tends to be colicky (like rhythmic- comes in waves) and is often accompanied by nausea. Fortunately the treatment is usually just to push fluids- I know, more water- just what we all want- but fairly noninvasive as treatments go. Please keep us updated! Thinking of you and hope you're feeling better soon!