How do I know if there is still glass in my foot or not?

I stepped off my stairs and onto a piece of glass as I turned. It stuck into the ball of my foot (right at the bottom of my big toe). I got a big piece out and couldnt see more but even with a bandage and socks on I still feel a pinch, not a “got a cut” pinch but “is there something in there?” pinch. I dont want to make the wound bigger but I dont want to leave a piece of glass in there-if there is one. How can I tell without re-opening the wound? Any ideas?