Ovulation bleeding or implantation ?

Okay so on Monday Oct. 26 my boyfriend and I had sex and when I got home that night I peed immediately after since I was told to always pee after having unprotected sex. Well when I wiped I noticed little blood drops, so ofc I was freaking out. it’s is now Oct.28 (but I, currently writing on the 29th) and I’m still looking at some brown discharge, not as much as before though. I took a plan B Friday Oct. 23 and I did take a test and it came out negative before the bleeding started so I started doing research. I also posted on here before and I was told it was just my period, but it’s weird because I’m still on my fertile window, and it’s not my period because I’m not feeling any symptoms of my period. Like thick clotting and heavy bleeding. The blood I bled was like light pink/ brownish color. I’m supposed to start my period on Nov. 14. Anyways sorry for this long explanation, I’m just really curious and confused, so I was hoping someone would help me out.