Light bleeding,brown discharge. happening lately.?

I Had unprotected sex on the 27th of october, but managed to use the pullout method. On november 4th I Experienced light bleeding but only when I wiped, after that light brown discharge followed it ended on november 7th. I did have sex on november 4th the same day it started I thought it would be because of sex but after it went away then on november 9th I had sex again and a few hours later i went to the bathroom and wiped and there was bright blood but it wasn't much it was just a bit, it went away and then today on november 10th I'm supposed to get my period I thought I was getting it so I went to the bathroom and there was a tiny bit of some sort of brown discharge kinda thicker then the first time I experienced it,I thought it was weird because my period is usually late. I've heard brown discharge is old blood, I thought this was happening because I was having rough sex but I don't know if that's what it is, or if its implantation bleeding, I heard that happens sometimes but idk if this happening so much is normal. Could it be some sort of infection?|||It could be implantation bleeding, you could be pregnant. You should take a pregnancy test.