HELP? Period, implantation or should be worried?

Bmp219
Let's start by saying I'm regular.  I spot on CD 24 and get my period after 28 days.  This month I had light pinkish spotting on CD 18 and bright red bleeding CD 19. This NEVER happens and it is NEVER bright red. CD 20 light brown spotting.  Should I be concerned? 

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