Even when training regularly I have occasional "man this feels like garbage" days, so no worries!
I saw something about the rule of 5 (not that 5 is exact, but just using it as a generality). Almost like out of 5 sessions 1 will be amazing (you'll think you should change plans because you are a beast), 3 will just be kind of checking off the box of doing it, and then 1 will be garbage (you'll now want to re-adjust because you suck maybe you have planned wrong and gone too far!). The overall message being it is probably more likely you are in the middle, don't let the highs or lows dictate your plans unless they become the norm.
Not that you were rethinking anything, good luck crushing the rest of it.