In a few occasions I had a mild persistent pain in my gb that only disappeared after a few flushes. You may have to flush again.
You mentioned eating banana. According to Mrs Chang banana is not good while we are cleasing the liver. Have a look at her website and learn more about it(www.sensiblehealth.com).
Persistent pain suggests something is not flowing as it should, maybe stones, maybe a congested liver with stagnant bile. Are you taking any bile mover(Artichoke Tincture, Chinese Bitters??)A stone breaker can also help you in this process(GCG, Chanka Piedra).