To help you further, I need more context. Are you trying to say:
* "Je suis toujours à la fin des temps" (I am always at the end of time)
* "Je suis toujours à la fin du temps" (I am always at the end of time)
* "C'est toujours la fin des temps" (It is always the end of time)
Please provide more information so I can understand your intention and give you a correct translation.