10/7/ I had sex with my boyfriend, but he did not ejaculate inside of me. However I do know its possible to get pregnant off precum.

I am due for my period today or tomorrow.

Last week I started having a brown discharge, it was on and off, never constant. During this time blood started coming [only when using the bathroom] , enough for a pad, but not nearly as heavy as a period. The blood was on and off too, never constant. So I assumed my period was coming. Well today everything has stopped.

Why was I spotting blood and discharge?

Implantation bleeding can't last for 7 days and wouldn't be more than a few drops of blood right? I mostly only bled while going to the bathroom, it didn't last very long.

Can old blood come for an entire week? This has never happened to me before.

Old blood can come for several days. What you're describing doesn't sound like it could be implantation bleeding, which is less common than you may think. I'd wait to see if you miss your period entirely.

BTW, I'm not sure but it sounds like you're saying you use the "pull out method". If so, then its only a matter of time before you become pregnant. If you don't want to be, I hope you're using more protection than that.