I don't understand.

I've never missed a period in my life. Been a day late a time or two but always had my tell tell of my period coming like spotting a day or two before and then full swing period the after. I also had ance pop up and the occasional vagina cramp. I'm going on day 7 no period no tell tell signs face is clear but a day ago I tested and it came out nagitive. I know I only had sex once two days put of my ovulation window which makes getting pregnant closer towards my period due date but would I still be testing negative? No stress no new medications and I just had blood drawn two weeks ago and everything paneled out great