I had unprotected sex 2 months ago. my last period was a few days late and i felt relieved it came. fast forward to now... i started noticing light brown discharge in my underwear a week before my period. it progressively got worse and the discharge was dark dark brown, almost black. The day of my period (today) the blood is still very very dark and it is accompanied by a little bit of fresh, red blood. It is very light bleeding (i have very heavy periods that last about 5-7 days).