It sounds like you have a wonderful husband. They are few and far between, so appreciate him!
The only advice I would give you is to keep flushing. Apparently waiting three weeks in between your 1st and 2nd flushes was too long. After my 1st flush, I had another flush two weeks later and that was the hardest one for me. It produced the biggest and darkest colored stones. After that, they got easier.
So, as you are able, I would just keep on flushing. I also had been told by my Dr I had gallstones, so I knew they were there. I was just determined to get them out!!
Good luck and good health!! You live in a place I have always wanted to visit!!