I conceived on March 19th and my due date is Dec 18th
Usually your doctor will go by the last day of your most recent period! So, for example, mine was Feb. 27th- I actually conceived march 14th, but as they go by the last day of period, my due date was DEC. 4th. Hopefully that helps! You can always look up a due date calculator on Google but the most reliable way to tell will be your 8 week ultrasound! If you haven't gone to an obstetrician or a midwife yet, you need to do so as soon as possible! Good luck!