Weird AF or Implantation bleeding?

Willow
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So my story is, from 6dpo to 10dpo i had brown cm very light just on toilet paper. Im now 17dpo and from yesterday I’ve had the same cm, I thought af was starting but I should be in full flow by now and it’s definitely just spotting. I took a hpt this am and it was a bfn. Has anyone had similar happen to them? My periods are normally very heavy the first two days. I’m going out of my mind!!!! Please help!

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