Hello, could you please tell me?) According to the first ultrasound, t…

Hello, could you please tell me?) According to the first ultrasound, the due date is February 19th, and according to the last monthly ones it's February 22nd. The doctor in the dispensary puts February 22nd. When should I go to the hospital? If at the maternity ward they said that if they don't start on their own, to come in at 40 weeks and 5 days?! (February 24th or February 27th).