stop taking the GCG until the 5 days prior to the flush. Until then, only take larger doses of the Chinese Bitters and Coptis. Take CB in the morning, Coptis at night, and increase dose of CB until you get a headache. This will ensure a most succesful flush! :)
If you can drink apple cider vinegar 4 days prior to the flush in addition to the GCG, that also would help ensure a very successful flush.
If you can, drink ginger tea as often as possible from now until then, it is another agent that promotes bile. Get dandelion tea if you can for the same reason and alternate or combine.