please give me ur advice?

Hi I'm just curious it may be a TMI but im in need to know. I had my period August 30 to the 3rd of September. I had sex with my bf on the 17 but when I wipe alil of blood came out mix with mucus the next day (monday) and then Tues I wiped what I thought was my period but it went right away and on Wednesday again alil reddish kinda pinkish came but just enough to when I swipe. Would you say that was a period and if not what could it be?. I also since my period is never like that but I also am always on time for my period and my next period was for September 27 to 1st of October but still hasn't came... PLEASE IF SOMEONE CANT GIVE ME ADVICE.