I am 4 days late today, about 4 days ago I was 10 dpo and had the lightest spotting a light brownish color that faded into the lightest pink, cervical mucus went back to clear after a couple hours everything was very like faint hardly any of it, the day before I had some back ache but that’s about it. I am now late for my period, I have never been late for any of my cycles in my life nor have I ever missed a period. I took a test yesterday it was a clear blue rapid and it came back looking negative and didn’t think anything of it. I looked again this morning at it and it had the faintest line. Could I really be pregnant?