I doubt you will hear tapping outside of the incubator with your bare ears. They don't exactly have lots of room inside an egg, and aren't banging against a wall or door. Wobbling is good.
Walk away and ignore the incubator. Laundry, a walk, a book, errands, anything to get you away from and distracted from the incubator. You are tunnel vision focused on it right now, which is fine, except you are looking for major changes every hour. They just don't work that quickly. I might check eggs in the hatcher 2-3 times a day, sometimes only once a day unless I hear lots of noise.