Pregnant ?

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So according to my BBT charting it was thought based on my temperatures that I ovulated on November 1st?, I had my first positive test on November 7th which seems way too soon if I actually ovulated on the 1st. My cycle is usually about 27-28 days long so I think I ovulated earlier than the 1st but I really have no idea. Think it’s actually a positive test or another chemical pregnancy?