TMI but I need help!

My last 2 periods have both been 38 day cycles which would put my next period on oct 6th. Today I started to bleed. Very lightly at first and then this. Didn't happen with my first two. Could it be implantation or just starting my period early? Woke up feeling hungover but only drank water yesterday. Thoughts?
​Not letting me add pic. ? 

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