I had sex last in september 25th this year.I have had my periods but they are always late with few days.
last month they were late for 6 days and before i got them i had a very brown mucous

, something i have never experienced before.
before september, in august, I first got a drop of blood then my periods came after two days.The last day to my periods, I experienced the most painful cramps in my life.
Im

my stomach is always unsettled, and once in a while I feel nauseated and dizzy.
Could I be pregnant?