surely this spell exists?

Try to focus your spell to one or two things. It can get confusing if you make a spell for luck, love, protection, banishing, wealth, and whatever else. Try one at a time.

There's a spell where you place 4 statues of different maternal goddesses in the bedroom, all facing the bed, and ask for protection. [Be sure to give regular offerings as thanks] you could try something similar with the elements or your deities. Just don't go overboard.

I like the book idea. Even if you dont want to use the spells it could help guide you in making your own.