Object in stool

I had diarrhea for about 3 weeks straight, but now it's mostly solid thought very soft. Got it tested and they found no bad organisms of any kind. But what's bothering me is that now and then I find these inch long, off-white/beige objects. They are about an inch long, maybe half inch wide, soft but hold their form, sort of remind me of artichoke leaves in brine or wet paper, and basically of folded over into thirds. They're obviously not tapeworm segments. It's not a every day occurrence, maybe once or twice a week; and it's just one the things in my stool, not several.