There are a couple of possibilities here and just to clarify, I don’t have that long of experience with these subs, however I’ve been through years of therapy and have dealt with this during therapy.
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It could be your mind telling you to skip a day because it’s overloaded and needs to process what’s there and to not add to it.
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It could be that you are up against a wall with an important breakthrough and your subconscious is fighting it (recon). If you continue you could have a major breakthrough.
My advice is to push through it ONE time and get a sense of what’s going on. If it’s because there is too much for your mind to process you will start to get foggy brain, less attention span, short term memory problems, etc.
If it’s because you are at the wall of a major breakthrough you’ll get a flood of excuses to take a break, get irritated, maybe even pissed off, etc. That’s when you try to breakthrough.
I was also in group therapy for a couple of years, everyone is different with how they handle this kind of mental work, but I’ve seen those patterns above not only with myself but with a majority of other people.

