you might have muscles on one side of your body cramped up and pulling tighter so you are kinda off alignment.
also the bones (at the joints) might actually be off alignment.
i knew this lady whose hips were off alignment. the chiropractor basically did some knuckle cracking, got them realigned and in a couple weeks she was better.
it takes a couple weeks because when the alignment is off your body and muscles get used to your body being like that and adjust. when the alignment is put back on, your body and muscles take a couple weeks to readjust again.