blueprints – that is absolutely not true. There is a famous maggid story that many people have a minhag to tell on Tisha Be’av night where the maggid essentially signs away all his olam haba to the town moser. I asked my rebbe if he really lost out because of that and he said absolutely not – HASHEM did not create a system where you can lose out [in olam haba] by doing the right thing, and for sure the olam haba of the maggid wasn’t lacking any from his deed. (The obvious question – so it’s worth it to give up your olam haba because you’ll get it back + more, so of course give it up, so why such a great thing – it only works if you’re doing it l’shaim shamayim – meaning you are really willing to give it up without the assurance of a “makeup”. There’s a story with the Gra, that someone asked him to daven for s/o, he said gezairah in shamayim i can’t, pleaded with him, so he davened, and was informed someway that he had just lost all his olam haba as punishment for “messing up” the gezairah. The Gra then said “Now i know that all my mitzvos were truly “shelo al menas lekabel pras”.)
Anyway, rest assured that you’ll get your full reward in shamayim.