Why do i get stressed by the little things?

Ok i dont know how to explain what i feel is wrong but for example i get really stressed by little things like if i have a build up of home work or my room is untidy or if there is a change in routine ill find it hard ro adjust i dont really know what im trying to say but every liitle detail in my life builds up like i want to know what im doing in order and at what times. Ok Hope this makes any sence? Thank you !