Did Noahs Ark and Adam and Eve exist?

If the story is true, wouldn't that mean that every animal and every person is inbreed from the only survivors on that boat? I guess the same could be said if we all came from Adam and Eve....their kids wouldve had to have sex with each other to pro create.....
Update: I don't mean this question in a negative way. Ive just put a lot of thought into it and its starting to pull me away from my faith.
7 answers 7