Need help

Ladies I have a question, okay so every month I knew when I was gonna start my period , boobs hurting , mood swings and etc . Well this month comes along I was two days late then the 3rd day it starts off really light pink , and then it stops it does the same thing but gets a little darker , I had no symptoms of nothing this month , have you ladies ever been though that . It don’t get darker it gets lighter but it switches up . Do y’all think I could be pregnant.?