Back pain questions

I completed my 2nd Liver Flush about a week or two ago, great results, got out hundreds of stones. Skin looking much better. Only thing, for the past few days I've been having really bad back pain from my low mid to upper back. It feels very very similar to pulled muscle.

Is the pain coming from my kidneys? Gallbladder?

Will I be able to do another Liver Flush in another week or two, or is that too much stress on my body?

I bought a tincture called Stone Breaker. I kept reading great things about it, thought it might help. Hopefully it doesn't harm me more. Tweet