I recall a dream involving multiple sigils, though I'm not sure when this dream occurred. They were all in a book which presented itself - I never touched it, it only flipped through pages to show at least three sigils per page, front and back.
I wish I could remember what I saw, but the pages began to flip too quickly before it closed. It's all a blur of lines, circles and triangles. The dream in itself also seems to be more of a blur now.
Perhaps something in the far recesses of your mind is telling you to learn and record the sigils you associate with your faith. Personally, if that dream occurred to me, I would start recording those sigils in a book form and see what comes of it later on.
I was going to suggest the same thing. Keep a dream journal next to your bedside and write these things down immediately after waking up. Even just a scribble of a sentence or two, and then the sigil's. Try to draw what you can remember of them, even if its just a vague outline. It'll make sense to your mind. Hope this helps.
I would spend time meditating on it. I think going over a book of sigils may be helpful, but I see it much differently than the others.
The book represents the book of life. In other words, it is the story of your past, present, and future.
There are many sigils out there that were used by the ancients and are still frequently used here today.
My suggestion to you would be this: Take some time and clear your mind. Try to imagine what the sigils looked like one at a time, in chronological order. As you picture them draw them out on paper. Keep erasing and fixing it up until it not only looks right, but feels right as well.
Once you sketch out enough to be self-satisfied, you can then search the web or get a book on sigils and see what you can find.