Someone has filed for a patent application this year and used my patent drawings and claims. How can I stop this?

As for the drawings and portions of your application text, yes he can do so. As for the claims copied from your application, he probably believes that he invented the claimed subject matter first and the issue of who is entitled to the subject matter as the first inventor (assuming that it is found to be patentable) would have to be decided by the Patent Office in a proceeding call an "interference".