My right side lower back sensation has come back out of no where and at the worst time. everytime i jump walk or lay down i can feel the bad sensation?

Ice/heat/motrin: At 17 years old it is most likely that your pain is from a muscle strain. Try alternating ice and heat to the area and gentle stretches. Adding an anti-inflammatory like motrin or aleve (naproxen) could be helpful. If pain persists see a doctor or a . Here is a site with info http://www.uptodate.com/contents/low-back-pain-in-adults-the-basics?source=search_result&search=back+pain&selectedTitle=1~150