FB profile picture change not showing up?

[Will]

The last two times I've changed my profile picture it hasn't showed up on my timeline, and when I changed it, it said allow on timeline, does anyone know why? Could it be because both of the pictures I used were ones my friends took that I was tagged in? Or is there something else, because it doesn't show up in my news feed, I'm assuming it doesn't show in my friends feeds either, thank you!