Yeah, I know that feeling. In fact, in the 10 years since I've watched Asian drama, I've taken a break often. Sometimes it takes me just a couple of weeks or months or even longer. Heck, The longest break lasted almost 2 years. During those breaks I still kept watching Asian movies though. And those movies were the ones that pulled me back into the drama scene, again and again. My point is, sometimes a break is needed. And when you hit that slump, you should take as long as you need. If you still can't focus it means you need a longer break. I would suggest to watch Asian movies instead, or as Joooya recommended, maybe animes.
Or, maybe watch daily 15-minute drama like Amachan or Oshin. :)