Keep flushing. I am much older than you, but took a ton of Antibiotics about five years ago and began to have symptoms like yours. Nothing helped until one year ago I began to flush. I did them about three weeks to a month apart.
I generally felt like hell after the flushes, but got tons of sludge, chaff, and stones. Some symptoms got worse. But about a month or two after starting, somewhere around the fourth flush, I started to notice I was getting better.
I appear to be one of those who runs out of stones, just about like Andreas Moritz , who did twelve flushes and stopped getting much more at that point.
I just did my 13th about two weeks ago, and like the one before I got zilch. Not even a pea or sludge. So I am going to stop for a long time.
But keep flushing. Don't do them closer than two weeks apart, but three or four is better. You will begin to heal.