For four days I been bleeding brown blood does anyone know why? I already had my period

I gotta question could I be pregnant and have 2 1/2 day period because I think i got pregnant on Nov 26 and had implantation bleeding on Dec 11 because I'm usually on my period for at least 4 days but mostly 5 or 6 which my full period was Nov 11 for 5 days ?? but in dec only 2 1/2 days it's kinda confusing really im excited about my Dr visit feb19 to know for sure :)

Somebody please help me!! ....I had my period June 21-27th and on July 2nd and by that point I was off my period for 5-6 days already I started bleeding bright red then pink brown and I told my sister and she said it could be implantation bleeding and ever sense then I been feeling cramps like mild cramps and throw upy and then on July 4th I started to bleed again bright red then pink brown then brown and by that point I was 7-8 days off my period still feel cramps from time to time and throw up...

Has anyone else have sex? did not cum at all but a few hours later had cum in them and on your underwear but I smelled like period to it. I still have not bleed at all.

So I keep feeling these lil sharp pains on my right side. You do get pains like that before you start your period right.? Remember I had that dark brown spotting for a few hours last month on the 22. My period suppose to start today.