you are tired, man! some studies say we can concentrate by just 20~40 minutes. orator know that and stop the main theme with some joking about each 20 minutes. Chess players are not different, if you play more you should and dont make light pause between games you lose concentration and a continued process by days can make you very very tired...
Think he is like muscles, you cant work a same muscle all days on week...
The good news is after a long rest you back more strong!
But bad news would be like a sprained wrist which it will never really heal unless you stay a looooong time without using your pulse (in our context that menas dont solve math problems, or anything complex, that is not about chess just).
How many losses in a row before you feel like you will never win again?
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"... thinking correctly in most positions takes time. Playing almost exclusively fast games obviously precludes practicing correctly, and so you will never get very good! Sure, fast games are fine for practicing openings (not the most important part of the game for most players) and possibly developing decent board vision and tactical 'shots', but the kind of thinking it takes to plan, evaluate, play long endgames, and find deep combinations is just not possible in quick chess. … for serious improvement ... consistently play many slow games to practice good thinking habits. ..." - NM Dan Heisman (2002)
https://web.archive.org/web/20140627052239/http://www.chesscafe.com/text/heisman16.pdf
I was on such a hot streak this week. I was seeing everything... Last night I dropped a couple, then today I started 0-2, won a game, then I've tied my record of 8 losses in a row... So frustrating, dropping pieces every game, checkmates come out of nowhere, analysis showing frequent missed wins... I did a few tactics and I couldn't even solve them...
After about 0-5 things get real dark for me. I feel like I've won my last game ever.