Looks like a baby jellyfish type deal, but what is it? Anybody?

I started pinworm treatment about a little over a week ago with my kids after seeing the little things at night. My 8 year old passed these weird things in his stool today. I've been making them let me check every BM and have become a bit obsessive about what's in poop. I know this can't be normal though- neither can (or maybe the world is a very strange place) could my BM from a few days prior after a few CE. All of us have the ribbon looking poo every few BM's, but what in the world am I seeing here? Should this be taken to my PCP tomorrow?
Also, I've had pretty severe weight loss in the past year following several months of diarrhea. It all came after my mother passed whom I was caring for. I get anxiety and wright loss, but I'm 5'8 and went from an already thin 127 to being 104 now. I look emaciated and hate the way I look. Even putting my hands on my hips grosses me out. My dr. Can't figure anything other than "anxiety" as the cause. Also have been having very sharp stabbing pains right under my left ribs and it almost feels like I'm "creaking" there when I turn. I've had cramping so severe in my gut while pooping I start sweating and almost vomit. But that's not every time I go. Also was tested for Inflamatory Breast Cancer because of a bizarre non yeast rash and skin thickening on my breast. Biopsy just confirmed skin thickening and no fungal infection. Could parasites be the culprit? She did think IBS, but all the meds did nothing. Tweet