Andreas didn't mention anything about Gallstones size in his book, but then he always is very selective with the truth in written text. It's only when you've spent lots of money and been doing the flush for a few years that he sits you down "for the talk", in which he presents a myriad of reasons for not releasing calcified stones.
I believe he came up with a cracker for your case, what was it? A silent stone? And when the flush didn't work he somehow thought camomile tea and lemon would coax it out. Gee, I might be jumping the gun but I'm guessing that didn't work.
Again Hanna, I'm glad your problems are sorted, but symptomatic relief is not the issue here.