I haven't used chanca peidra for stone breaking and haven't heard anybody else report the tiredness from taking it. If your body is showing you it's doing something, try taking it on days when you can let it do it's thing.
There are many ways to soften and break stones, whether kidney or gallstones. Use the search window at the top of the forum page and try them all!!
You diet looks better than most, congratulations!
MH theoriezes that therapeutic doses of unrefined, cold-pressed plant oils will loosen liver congestion, especially liquid lecithin. If you've got congestion to the point of gallbladder attacks, I don't know that you have the patience to try this!!
In your busy shoes, I'd eat apples, drink apple juice as part of my regular diet everyday. I'd incoperate plant oils as a supplement, not just salad dressing. I'd start flushing on a regular schedule.