Talk to Cosmetic Surgeon on I Feel Pain In My Backbone Lower Region .my Left Side Foot Asleep ..

AoA . Iam 19 Years male . Iam Fsc Pre med Student . I was Doing preparation for my Improvement Exams continuously for last 4 months . I studies Almost 10-12 hours daily . My exams Finished 10 days ago . Before 7 days of my exam I felt Pain In my backbone Lower region .. I ignored it . i thught It is due to continuous sitting On bed . But after 2 days my left side Foot asleep .. It increases day by day during my exams i cannot put weight accurately on left foot . But after exams Due to rest And Some Walking it becomes better .. But Now Iam feeling Much pain in My Backbone lower Region Like Something spasm . I cannot Sit On Bike Seat easily And cannot bend Easily whenever do it Hurts much . Now My foot is not asleeping But pain is much in My Lower region Of Lumber . kindly Tell me Why is it ? and What Is Its cure ?