What Does Early Periods With Heavy Bleeding And Brown Discharge Mean?

my periods have always come on time last mouth i came on twice in the same mouth the 1 i had a heavy bleed the other was normal. this mouth i was meant to come on on the sunday which i came on on thursday which was only brown discarge same agian friday by saturday it was blood then sunday it was brown agian monday in morning in was brown then went blood by the night time it was blood and ever since its been brown until thursday