I'm putting the link for Dr. Clark's official cleanse at the bottom. I started by doing low doses (one capsule once a day) and have gone up gradually. I also use the Black-Walnut hull in a low dose for Arthritis managment, I haven't done the Liver Flush yet. At any rate, I'd personally recogmend the 2 I've been using for about 3 weeks. It's not a fantastic idea to do any treatment (meds or natural) in high doses for a long time.
I had the very rude treatment too. I kept saying that something was going on and the wouldn't listen. Finally I got a series of ultrasounds that reviled that it was a bonafide false pregnancy. First one showed the uterous as twice the regular size. the 2nd showed it was normal and the 3rd showed that it had adhered together! Then I had a period and that took care of things. I think those doc's need a good dose of their own bedside manner. It' awful for them to do that to a worried patient!!
At any rate, I'm glad that your pregnancy worries were put to rest! :)