Girls, please share your experience. I have my due date today, April 1…

Girls, please share your experience. I have my due date today, April 12th, 2022. I can't wait. Training contractions started as early as the 38th week. The hospital said to expect until the 13th (according to the first ultrasound calculations). On Thursday we will go to the hospital if nothing happens. Who gave birth on their scheduled day and how accurately do they determine the term based on the first ultrasound calculation?