How things are

I’m having trouble with a concept I’ve heard a few different places in scholars. Things work out / happen the way they are supposed to because that’s the way it happened (I’m paraphrasing). I understand in terms of acceptance of reality but I can’t let go of the “yeah but if I had done it differently in the past then I wouldn’t be where I am now.” So that gets me feeling anxious vs reassured that it’s supposed to be this way.