pms after period.

i had a weird period. it started 12 days late, started with dark brown watery blood and no cramps or pms. then it went to a dark crimson reddish mid flow which is super weird because usually im heavy. it lasted 7 days and now im started to get cramps and light brown discharge the day after it stopped?? any insight pls.

there where no clots at all. the brown blood was thin and the red blood was barely thicker.