Hello, new here..

So today I was supposed to start AF, but she is not here... I have been cramping sense ovulation, I been having headaches, cramps on right side the most, I have had cm watery but milky at same time, which I dry up after ovulation. 4 days ago I took a test and BFN, I am to afraid to test today bc it might still be to soon. Idk if the issues I am having is pregnancy or af, I uselly have sore breast a week before af, and don't, like I said before I uselly dry up after ovulation. So what are your thoughts.. so tired, just want the big fat pregnancy!