What Causes Burning And Tingling Sensation On The Lower Back?

Hi there a couple of weeks back, I went to my gp as I had concerns of a slight burning tingle sensation in my lower right back when I ate something like chocolate, the feeling seemed to regulate with my stomach, I Had no other problems such as heart burn et. I was prescribed a months course of Lansoprazole PP1 30mg per day, I took these fur 3 weeks but gave up as they were making me feel unwell. The first 2 days after stopping I ws fine however by the third day I was having a burning gnawing pain in my stomach and like a burning sensation behind my lower left ribs and stomach area... this is still happening I have now been off them 6 days, and have this burning gnawin pain in my whole lower left rib stomach, area, I had nothing like this at all before I started these PPI s can you please tell me if this is most likely some kind of Rebound effect of a sudden return of acid to my stomach... and will it likely correct itself without damage??