OK I'm 17 and me and my boyfriend have had sex a few times.. I had my period aug 8th (1 day after we had sex) then like 3 weeks ago we did it again but I started bleeding during it.. but the bleeding stopped right after and I had a light brown discharge for like a day... then we had sex like a week and a half ago.. but now I have the brown period again that is pretty light... idk if I should be worried because I haven't gotten a normal period since August 8th?

Its normal. Brown blood is old blood that is coming out. It happens to pretty much everyone.

If you stopped getting your period all together THAT would be something to be worried about

Thanks but the only thing is... idk if the brown blood is my period or not because its not as heavy but I still need a liner