yea the best thing to do is just throw it out, if it is fertile its not going to hatch anyway. throw it away. if she lays another more than likely shes trying to replace the one you took thats when you need to start replaceing them with marbles or fake eggs. so she feels like she is completing a clutch. make sure she gets plenty of calcium and she should be fine. as long as she is no longer mateing with a male there should be no more fertile eggs evan if she lays. females will still lay eggs when they are ready to breed evan if they havent mated. so that is to be expected. goodluck.