Questions. Lots of Questions.

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So about midnight (when I went to bed) last night I noticed some brown spotting (only when I wiped) got back up around 6:30am same thing it continued on until about an hour ago it seems like it’s getting lighter. My husband and I are TTC. af is supposed to start tomorrow. So could it be implantation bleeding or just af fixing to come. Also if I took a test would it be to early for it to show up? 🤷‍♀️