hi doc,i m having pain in my right leg below knee sumwhere around calf muscle ,i m not able to stand for long time ,like after 15 minutes of standing my pain starts and stay for a long time ,i m not able to bend knees it start hurting as well.when my body is more stressed pain starts moving towards my thigh.my docter suggested me efetran (bd),gabafix-m (od) .and suggested physothrapy too.am i on right medication .wht my problem exactly is ?