Period early and short

Jade
Hello guys 
So my period should start tomorrow but it started wedneaday and finished Friday evening, it was really light and short. Since I had my little boy my periods have been on time and I normally have one day of heavy bleed. 
Has anyone else had this or know what's going on? 
I also posted this on another chats but not sure if was the right one. I'm new to this lol