My USB pen's silvery bit (don't ask me what the technical stuff is, I have no idea), is not going into any USB port whatsoever, I've tried many, because for some reason it keeps going down into the holdy bit. I have to pull it out of it, not completely, but when I try to put it into a port, it just goes back down again. I can't access it whatsoever. It will go into the port, but not enough of the silver bit goes in, because it goes back down. This has all my files for college on it. What do I do?