Is this normal?

Kristin

This is my first month charting BBT. Was this a normal fluctuation or should I start preparing for a negative HPT? FF says I ovulated on CD15 so that makes me 9DPO if that makes any difference. I should also not that the “spotting” was more I noticed brown on the tissue after wiping a few times (same trip) and in my underwear but never again after that bathroom break. Thanks in advance!