I Had A Fusion In My Lower Back In 09...have

I had a fusion in my lower back in 09...have had to have injections since then. My legs are weak and they hurt really bad. Even my feet hurt. I can hardly walk. I am on muscle relaxers and pain meds.. My pain dr. isn't doing much. I can't have an MRI because I have a pacemaker. I am going to see my pr. dr. next week.