i've just completed my 3rd flush. the first 2 i had good results and my belly rumbled. this third time, my belly didn't rumble and i got only 4 pea sized stones and maybe 50 small ones. i used the clark recipe. seems to me that the rumbling is a more forceful expulsion of bile, which pushes more stones. i know each flush is different, but why would this flush be so weak? also, i have a friend who's done 4 flushes and her belly has never rumbled. she's disappointed because she has really bad allergies and was hoping to rid herself of them. what could be wrong?