Even if it ends up NOT being ankylosing spondylitis exactly - you should know that there are some hereditary factors that predispose to AS but also to other, similar conditions which are collectively called “inflammatory spondyloarthropathies.” Given your brother’s diagnosis you probably have a higher chance of one of these conditions because of your shared genetics. So yeah absolutely ask another physician until someone investigates your symptoms!
This trailer is my favorite even though it’s old now.
Tap for spoiler
It’s when they added pipes to the game.