I'm sorry to hear you feel so awful. It may be that it will take longer to get the Topiramate out of your system, it certainly took a while for its affects to leave me. Did the doc have any experience of this? It is the only thing that has ever affected me mentally: never suffered with any hormonal mental effects despite being enormously sensitive to hormone change. It is a very powerful drug that they suggest you build and decrease very slowly.
Try not to panic, hopefully things will calm. Try to feel positive that it was the Topiramate and that things will improve. My crazy anger (which I was entirely convinced I was justified to feel) did gradually dissipate.
I wish you well 2cats x