Roundworm?

Hi,

I found this forum when researching a worm that was in my stool yesterday. I'm not completely sure what's going on, but it really looked identical to a roundworm that I saw when I researched online. What I'm confused about is that I just had testing done less than a month ago and it came back negative for parasites. I am having parasite symptoms, although they seem to be able to be attributed to just about any medical issue. Significant fatigue, unexplained weight gain, thyriod is under control, adrenals are still being worked on. I've been doing a cleanse for gut health (metagenics) for about 3 weeks. It doesn't seem like this protocol would kill off roundworm, but I had an adult (6 to 8 inch) roundworm in my stool. Correction, with my stool. It wasn't intertwined. Not sure if that matters.

I was curious on any thoughts people might have.

Thanks!