ok this sounds so stupid... but I really cant remember taking my tampon out and now I cant find it, so if I didnt take it out will that effect my health at all !?!
How long could you guess it'd be in there? I'm assuming no more than a day, so it couldn't have just dissolved or broken down in one day.
However, it may have crept up further, so wash your hands really well, and try to see if you can feel around really well, and see if you can find it. If you can't, go to a doctor.
The result of this is called "Toxic Shock" which can and will kill you. Read the instructions that come with the tampons. See a doctor if necessary, this is a serious issue.
Never try that with a banana! Peeled that is. What happened to the string? Don't they still have strings on them? What do I know? But I do know about bananas. >:)
It might have just fallen out. There's no way your tampon can go inside of you. Your vagina's too small for it to go all the way into your body!
GO TO THE DOCTORS...