As the Gemara says, do teshuvah the day before you die (that is, since no one knows when they will die, we must do teshuvah daily). And why omit mentioning something in your daily teshuvah just because there is some doubt about whether you did it?
Of course, after doing teshuvah you can add a prayer to help you keep track of and remember your actions!
Why should you assume you did something wrong unless something occurred to make you doubt if you did what you were supposed to do or did what you werent supposed to do. Meaning why would you assume you didnt make kiddush friday night if thats what you always do friday night…?
The Rambam in Hilchos Teshuvah 1:2 says (talking about the times of the Beis Hamikdash) ??? ????? ?? ??? ??? ???? ?? ??? ????? ????? ?????? ???? ???? ?????
Whether it was known to him or unknown to him, everything is atoned for with the goat of Azazel, provided he did Teshuvah.
This would imply that Teshuva must be done even if individual who committed the aveiros never found out about them.
Theres such a thing of an oneis if the person was ill or for whatever valid reason couldn’t do the mitzvah then you are called an oneis and you are patur from performing the mitzvah. If your mind wwasn’t there due to medication or whatever if it is a valid oneis then that’s it you are patur. Is that what the case is here?
An oneis means you really couldn’t do it a real accident. Not feeling up to it is not an oneis unless you were medically unable due to physical or mental reasons. I can’t paskin for you. Please ask a Rov.