Get an MRI and find out what's going on.
I had a chiropractor "treat" my back/leg pain/numbness for three months (courtesy Naval Medicine). After a point I was on crutches and could barely take a $hit without seeing bright lights flashing in my brain.
Finally got an MRI and the L4/5 disc was ruptured. The Chiropractor's eyes bugged out when he saw the MRI pics, and he said there is nothing he can do for me.
Finally on to a neurosurgeon and a diskectomy. I'm now in constant pain. Managing it without a lot of drugs is the best way to live.