12 days late

Bailey

Hi, looking for any insight or ideas on my situation. I am never late or miss my period . I typically have heavy flow for 10 days and the time between my cycles is usually on time or comes early. I am currently 12 days late. 9 days late with 3 failed tests I got a blood test that came Back negative. Still no sign of AF and I’m talking myself into having “symptoms” anyone else have something similar?