Anyone know about kidney and/or gall stones please?

i started having pains in my lower back and whole pelvic region 3 weeks ago, but was diagnosed with a cervical infection (had a lletz to remove cinn 2 and 3 in may) and given antibiotics. It calmed down a bit, but in recent days, the pains have recurred. Now they come in waves, maybeye 2 or three times a day, or night. They extend from behind my ribs, right through to my lower back, ocks,and then, right down my legs, especially the right leg. i can feel the pressure in my lower back all the time,and it all feels really tender. but the pain comes and goes. I am starting to feel a little nauseous today. the doc says it might be either kidney or gall stones,not an infection. she has ordered bloods and an ultrasound in a week or so. she tested my urine, but it was clear (literally, i pee clear water), and showed no problems. the pain and discomfort is worse at night when i lie still. i dont know if one side is worse than the other, it just really hurts when it comes on, for an hour or two. what are others experiences of either of these conditions please? does it sound likley?