That’s in my experience totally normal, and so is the doubt about whether you’re crazy or imagining it.
Keep a really good journal and log these things, and also review your journal regularly (ideally every month or so) to look back and spot moments when things that happened later made sense. I still struggle to remember to do this but every time I do, it blows me away how the smallest thing “back then” predicts a ton of significant stuff afterwards!
Something else I’m JUST geting tinto doing is an alphabetical index of names of spirits (I mean ones revealed who aren’t in any grimoires), words of power, and so on, it’s so easy to let them slip from your mind if you’re always doing new things. :\