I think I might have a kidney stone, but I'm not sure I have a constant pain on my left lower back side and movement makes it worse. I have stage iv follicular lymphoma and I'm doing chemo. I have had 2 kidney stones in the past that have had to be surgery removed due to size. No fever or vomiting at the moment. It started this morning and the pain has increased. It's ok if I sit still and don't move.