sometimes the best thing to do is wait. the fact that your shoulder pain left for a short time is an indicator that you are on the right track. it is totally normal to have the symptoms come and go throughout the cleansing process, at the beginning. flushing once a week is too much. some people benefit from doing colonics/enemas after flushing to get the yuck out.
if you had acute pain in the liver/gb area that would indicate a stuck stone. in that case a flush would be called for. but you don't have that, so flushing one week later isn't necessary. andreas says to flush no more than every 2 - 3 weeks, some people flush less often than that.