Should I take a pregnancy test if I have brown mucus at once?

Hi, I have been using Vines tablets since August 2020, take them regularly, always at a fixed time, with my partner we always apply additional protection in the form of a condom that has never let us down. I am currently on the 12th active tablet with blister and according to the Flo app I have ovulations today (I know that the calendar for tablets is the average connection). I had a double-protection ratio of 31.05 and today I had a one-time brown mucus with a really small amount of blood- could this be a symptom of ovulation despite the fact that I used tablets from this blister as always, that is, correctly or somehow any tablet was badly absorbed? Or could it be bleeding 3 days after intercourse? I had normal withdrawal bleeding, as always. I would add that I had a ratio of 31.05 after a "long break" ie more than a month has passed since the last close-up. I had no brown slime on my underwear before with the previous packs. Should I take a pregnancy test? I came home from work and the mucus is already "normal", no trace of brown besides the one that remained on the underwear.