This looks a lot like stuff that appeared, wrapped around my (otherwise healthy) stool, the first two times I 'went' after a colonic. I was feeling a dull kind of achey pain in my tummy for a couple of days, too. My colon therapist, and Shelley (askshelley.com) said it was some bad parts of the mucous-lining of the colon. I think it would have to be a very bad/unusual case of candida for you to be expelling threads left right and centre! My candida just makes itself seen during colonics, as lots of fermentation.
What kind of thing are you eating - are you doing lots of bowel cleansing? Maybe give it a rest for a while and eat only soft/liquid things. I'm sure it's only good to be getting rid of that stuff so fast, though...