I had braces for 2 years and in the end recieved a clear plastic retainer. I wore the retainer for two years but recently i stopped for a few weeks. Now two teeth on the bottom show have noticeably shifted and I lost the retainer. Will i need braces a second time? Because I think if i make a new retainer it will have to be in the shape of my shifted teeth. What will happen to my teeth and what should i do?