Bleeding

Hi ladies, 
I've been bleeding for 7 days now .. It's a light flow but im convinced it's not my period because I haven't got the cramps that I usually get, and my last period was September 27-October 3rd. 
It's a dark red/brown colour and super thin blood. Nothing hurts and I've been feeling ok but it's worrying me now. 
Should I go see a doctor ?

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