So My Period Always Comes On The 5th This Month

So my period always comes on the 5th this month it was the 3rd and it felt like water and when i checked it was light pink water with a little brown and i taught my period was going to come down so i got prepared nothing i started to spot the next day on the 4th it looked like it wanted to start bleeding normally but it only lasted half a day it went away and on the 6th and 7th day it was a light pink discharge with a lil brown and it was slimmy