Help!!

I have been regular for 12+ months now, and no more than 2 days later than expected. I have irregular ovulation, and have never been pregnant. My chart says I am 6 days late.. and I took a pregnancy test tonight at 10PM after drinking a gallon of water throughout the day and it was negative. I am going to retest in the morning, but I want to know if there is any chance of being pregnant after a negative test 6 days after expected period. I have had no spotting, (I start spotting 2 days before my period) increased CM, and a super high sex drive as of the last 2 days. My expected ovulation date shown on this picture is not accurate, i tested and it was negative, so I either didnt ovulate or I ovulated later in the month.