UPDATE:
My stool test came back normal. I figured if it was a roundworm it would be tapered at both ends, but that picture looks rounded and fatter at the ends. Also, they should have seen the eggs, since what I was reading said they shed a lot in stool. It definitely doesn't look like a pinworm, hookworm, or whipworm either. ( I researched A LOT :/)
I'm hoping it is just a one time thing and if anymore come out like that I will call the doctor again.
Thanks!