I have been having this uncomfortable burning sensation in my lower back for 3-4 weeks now, this feeling starts as a burning sensation, feeling nauseous, headache.. I feel that I have to be constantly moving to avoid this pain, this feeling travels from my lower back up towards my kidneys and under my ribs. I have been prescribed naproxen by the nurse but I feel this medication make me sick, cause heartburn and I have no energy..what do I do?