Yes. I have had lower back pain near my kidney for the last two days. I have also had to urinate a lot in the last two days. The lower back pain feels like it is moving to my leg. All of this is on the left side. Also i just started my period three days ago. It started the second day when I woke up I had terrible lower back pain. Why do you think this is happening or what could this be symptomatic of? Thanks.