Tmi help

Ok so in july i experienced a very weird period. It was 4days late also light pink and brown for only two days. It was very light only noticeable when i whipe. I usually have a bright red period with clots every month. This month af arrived right on time but still just extremely light could use the same pad the whole time if i wanted only light pink and brown. What could be causing my af visits to be so weird.