My Right Kidney Area Is Painful To The Touch. It

My right kidney area is painful to the touch. It is also spasming for 3-8 seconds following certain movements. Began feeling tenderness 36 hours ago or so. Becoming more sensitive with time. I strained my lower back slightly two weeks ago - but that largely went away. This feels different than that lower back strain. As an FYI, we are in Rapid City, SD on a road trip from home in Minneapolis. Drove Friday (9 hours) and plan to return tomorrow. Any advice? Thank you.