Help??????

Eva • Loving taking care of my bby girl Jasleen FTM.💞💕
I have a question so on Saturday night me and my husband had sex but after I noticed that I was bleeding not extremely but it was more of a spotting. The next day It was brown and when I use the restroom I wipe and it's brown. And idea of what could this mean?? By the way I'm 36 weeks pregnant. Should I be concerned????