EXPERIENCE: Ultrasound showed no stones-Will a flush still produce stones?

I recently had a bad case of extreme pain which was originally diagnosed as gallstones. However, the ultrasound showed no stones in either the gallbladder or liver and all my other abdominal organs were said to be in healthy condition. I've been taking the lemon/olive oil/water mixture every morning for two days now and thought I'd finish it up with an Epsom Salts flush this Saturday.

My questions are: Should I continue on as planned to do a flush this weekend?

***Has anyone ever had a 'negative' ultrasound and still produced stones following a flush?***

Thanks in advance!