Glass Shrapnel: In or Out?

An anonymous poster (see blog below) ponders how the glass shrapnel that has been cause for concern for over two weeks has disappeared. This, interestingly, has been something that I've wondered about as well. There are, of course, three choices. One, it could've just stayed in my thumb. This is doubtful given that I feel no pain or pinch upon applying any pressure. Two, it made its way into my body. Very alarming. What if it's now floating around in my blood along with the blood cells, etc, and is enjoying its ride in me? Unfair! Like a little dead fish, except in me. In my blood, not sucking it, but swimming in it. Eventually, it'll end up in my heart or some other useful organ i.e. not the appendix. Very concerning. But, now if I disappear you know why. And of course, the third and best scenario is that it managed to get away, to which I say 'coward, face me if you can!'