Is there an alternative to Chiropractic?

I think i have a subluxation/misalignment in my back. I heard chiropractors are the only ones that can diagnose and treat this. But i also heard they are very risky. Although i was thinking about using the activator technique which is less risky im still up for alternatives. I have a very weak back so it might go back to its original position after adjusting. So does anyone know what else i can do? I also have a slight bulging disk and have had chronic back pain for 2 years.