Does Too Much Fiber Cause Stringy Poop?

i know this is groce but today while i was in the restroom going #2..my ... was just hanging there it wouldn't come out so i had to grab it with toilet paper and pull it & Omg it was stretchy & sick! Uh Sorry! well Im almost always constipated & didnt poop for like 3 days so i guess two days ago i over did the fiber and didnt poop until today.. Could that have caused it or would it be a worm? how do you even get worms? i thought it was only from meat & im vegetarian.. please serious answers only Thanks(: