confused???

so the other night me and hubby did the deed on the couch i was on top and my man is above average if you feel me no he didn't finish in me but idk if he had pre cum or pre ejaculation I'm not on ANY birth control methods and he didn't wear a condom BUT he didnt cum in me and my period isn't due for another 7days (((says my <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a>))) and i just peed and i had a little brown blood and he made me bleed afterwords thst night so ladies what are the odds of this weird blood being implantation blood/bleeding