I’ve no anime suggestions, but, like all of us, I’ve been there and do have a suggestion.
One bad day almost always turns into a streak of difficult and demoralizing days.
Stopping lessons until you recover is obvious.
Far less obvious is that the fix is more reviews, not less. In particular, I believe in as many repeated “out of band” (self-study/extra-study) reviews of stuff in early stages as you can stomach.
Out-of-band reviews of stuff in later stages (guru-enlightened) is cheating yourself. You want to test your retention so the SRS can do it’s magic.
In my (strong) opinion, reviews are of two types: actual reviews (stages 1-4: frequent iterations to get stuff into your head initially) and retention tests (to see if the stuff you learned really stuck after gaps of several days to four months without a review).
I believe “extra” reviews of stuff in earlier stages is always valuable and NOT cheating. This is true whether the stuff came from recent lessons, or because you missed your retention tests with higher stage stuff and they’ve fallen back down.
I’m a huge fan of the self study script. The new extra study feature is almost as good, but I like being able to focus ONLY on stuff in stages 1-2, only stuff in stages 1-4, etc. Depending where I am in a level, I sometimes omit vocabulary and only test myself on lower stage radicals and kanji.
Whenever I feel that yesterday was a particularly difficult day of reviews, I force myself to go through repeated iterations of self-study, continually re-quizzing just the items I’ve missed each iteration until I can score 100%.
Each iteration with only the items I missed gets shorter and shorter. If I’ve still got time and energy, I follow up with another full quiz with all the stage1-4 items as a final pass.
I do this before my formal reviews (and not on the same day that I suffered. I then immediately start my real review session.
Obviously I score better on my real reviews after self-study. Surprisingly, it also helps significantly with EVERY subsequent review session.
I believe all of us benefit with more iterations of stuff in early stages than the SRS normally gives us.