You may be stuck in the Milky Way but new research suggests the carbon that makes up your body took an intergalactic round trip on a cosmic conveyer belt.
Building blocks of life on Earth left the Milky Way before being pulled back in : Read more
That comes as no surprise, we know there are stars that have been flung out of the plane of the galaxy and then will get or have got pulled back in by the mutual gravity of the system, that streams of gas and dust undergo it to is not surprising, what would be mnore suprising was if it was found they didn't.
Given that the Milky Way has absorbed countless dwarf galaxies and interacted with M31 already, it is also highly probable that a lot of gas and dust came from these galaxies and is on its own orbital path that sees it dip in and out of the galactic plane.