YES! You can take a small dose of Epsom Salts while having the pain you mentioned earlier. Even a small dose of 1 teaspoon in a glass of water or juice may help, and that low an amount shouldn't cause the dreaded "bathroom emergencies" (unless you're VERY susceptible to Epsom Salts .) If 1 teaspoon doesn't offer relief within the hour, do one more.
Only calcified stones will show on an ultrasound. Softer, still forming stones can be completely congesting your liver and NOT show on an ultrasound.
'Belle and Hopinso will take very good care of you. They both really know liver flushing. ;)