Implantation?

Hi all. I'm just looking for advice on implantation bleeding. I have regular 28 day cycles however this cycle on 6dpo I had pink on the toilet paper and in the toilet bowl. 
Can implantation bleeding be just one wipe? Or does it have to go on for a couple of days? This was 3 days ago and I'm hoping it was implantation but it was literally just the one time. 
Any response is appreciated!!
Thanks 

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