Am I pregnant or are my hormones out of whack!

Sam

Hi! 32F here I was on birth control for a total of 7 years. First the Mirena and most recently the pill. My husband and I decided to expand our family and give our son 7 a sibling. I stopped taking the pill right after Thanksgiving and I haven’t had a period yet. I am officially 5 days late and I’ve only been late one other time in my life and what was when I was pregnant with my son. I got pregnant right off birth control with my son. All the tests I’ve taken are negative. Is my body adjusting or could I be pregnant this quickly ?