Wrong Due Date

Due to probably slight medical neglegence of not being able to get an appointment with my GP for over a month I didn't have my dating scan within the time it's recommended (they could tell us the gender first scan) my due date ranges over the space of a few weeks meaning I'm either 32 or 35 weeks pregnant from estimates from multiple doctors.

Has anyone who's had a similar thing happen got any advice on calming nerves? My life's just a continous waiting game as I have such a wide time frame on when baby could arrive.