Was it a peice of undigested spaghetti or do I have the worms?!

Well roundworms are described to look like spaghetti so thats probably what you have lol.
Doctors appointment now!

EDIT:
Apparently according to
http://www.nhs.uk/Conditions/Roundworm/Pages/Introduction.aspx
Roundworms only come out your bum if you have a SERIOUS worm infestation

"In some cases of heavy worm burden, you may pass an adult worm in your stools (faeces) or one will come out of your nose or mouth. An adult worm is a pale yellow/pink colour, has a long thin body, and can grow to up to 41cm (16 inches) in length."

"In the most serious cases of heavy worm burden, blocked intestine, or pulmonary ascariasis, the worms can cause damage to organs and tissue which will need to be repaired using surgery."

REALLY need to see a doctor!

This is really funny!!

Could be threadworms yes, but there's nothing we do, see a doctor asap.

threadworms are so tiny they are nearly invisible. this sounds like a big ass roundworm.

quite common actually.

course of mebendazole will do the trick.

I almost fainted reading that. Plus worms are nothing to fret about they are quite common.

Actually a piece of spaghetti can go out undigested if you swallow and not chew it. I recently pulled one out of my butt, a yellow and slimy one.I took it in a jar with me directly to the doctor, and photgraphed it. He concluded it was a long spaghetti, it also wasn't moving. and threadworms don't usually die in the intestines, so most likely you need to learn to chew your food instead of swallowing spaghettis whole. Remember guys, spaghetti is made from starch, its just starch from wheat. That stuff is strong and can easily do undigested through. Als othe fact that I pulled it straight out of my butt, implies that my diet isn't so good. But again, ALWAYS photograph and send the image directly to your doctor's phone. It's the fastest way to get a proper response.