What Causes Lower Back And Leg Pain After A Bunionectomy?

May 16, 2017, I had bunion surgery and 2 weeks after my surgery my foot was on its way to healing very nicely and it was painful the first week but no complications. After the second week I started using my heel to walk a little...4 days later I started having extreme pain lower back and down both legs. I have never seen a dr. for my back but I think last year I started noticing that maybe I was having trouble with sciatica. I am on third week of seeing chiropractor and still experiencing 8 for pain. Today, he was disappointed and said he would give me another couple of adjustments and then maybe the decompression table and if that did not work he would have to refer me. I am 67 yrs old in good health and exercise at gym 2-3 per week. I am having trouble dealing with this pain and have faith that it may be temporary. Would you have anything to add like what kind of fitness do you recommend that would rid of my paid and not have surgery??