spinal lumbar stenosis

diagnosed with s.l.s.  last year...since...had just one pain relief injection which worked great...no more since..was told hospital cannot afford any more !  meanwhile its got worse...living on a mixture of painkillers..i.e.  codeine..naproxin..co codamol  500/ 30..weakness getting worse in legs and feet numb...need to wee more often now  but  nothing touches the oain..  G P still trying to get injections re instated   getting me down a bit now !  any advice ? thanks