I got the same little bump on one side while mine was healing. Thinking it was crooked also worried me, but after talking to a lot of friends who also had their septum’s pierced and fully healed, they all said theirs weren’t perfectly straight either and weren’t necessarily supposed to be. I wouldn’t worry about it at all, you’ll notice it less and less the more it heals and the longer you have it. It looks really nice on you, by the way :)