I have done about 40 flushes. I experienced this once, bad pain for about 2 weeks. I did another Liver Flush 2 weeks later and that got rid of the bile blockage and the pain left.So I think the pain is due to the bile blockage.
I am not sure if it is convenient for you to do a Liver Flush while you are away but you might want to do the Liver Flush again strictly following liver flush instructions.