If you deleted your watch history, you also deleted your "Continue Watching" content. The shows and movies you haven't finished yet will no longer appear in the section of Netflix that allows you to pick back up where you left off. Honestly, there is no way to recover the content if you deleted it, but you can always start watching the show again. Many users have complained that their "Continued Watching" content disappeared. Assuming you didn't delete it, but it is gone, you can contact Netflix support for help. A glitch causes this content to disappear, reappear, and then disappear once more. Because the feature makes the platform much easier to use, it's worth reaching out to Netflix's support for help on this one.