AF showed her ugly face 😪

So after a long week waiting for my period AF showed her horrible face. This month has been a little odd though. Day 1 was light spotting brown color and then went away for about 16 hours day 2 was like a normal start day of my period a medium flow good color just a little thick day 3 which was yesterday was heavy which is normal for me but really thick and a good color but today it's brown I'm so confused cause this has never happened to me. The only time I usually see brown is Day 6 of my 5 day cycle because it's cleaning itself out I guess. But it's brown and like a light flow I'm so confused 🤷🏼‍♀️ anyone know what could be the problem?