Late late late....

I'm 6days late, though it has felt like I've been on my period the first 5 day (cramping, fatigue, hunger, uncomfy feeling.) I haven't been late in 6 months and when I had been it never felt like this. I took a test yesterday morning (5 days late) and it was negative.

I'm trying not to be to hopeful because this has happened before. I know not to compare pregnancy (if I am) because my first one I was a day late and it was positive. Trying to remain calm and not stress.

Any advice?