Please help me decide

So I go to a chiropractor to align my misaligned jaw, from night grinding. Ive been going a year and its slowly healing. They also do back and neck adjustments, saying my x ray last year showed I needed it. I just accepted it. Recently somehow the tool they use really hurt my spine for several days. Piercing pain. But, its never done that all year. So I wonder, do I tell them stop back treatment, so it wont happen again, and just focus on jaw.. or just continue back as well, as it only occurred once? Im torn.