Hi, I have read your problem.You should not take any medicine especially etoricoxib
as this medicine when take in wrong or excess doses has side effects like dizzy spells, lightheadedness
. So fist of all you should stop taking this medicine and get your xray of lumbosacral spine done in AP and Lateral view done ,then send us reporting of your xrays or discuss it with your doctor .Till then apply hot packs for 30 mins in morning and in evening for 7 days and take painkiller+muscle relaxant
only by discussing your doctor . You can apply painkiller ointment in aching part.