Oh god, my brain was so foggy I couldn't even calculate basic math during pregnancy! Honestly, just use an online pregnancy calculator and put your last period date. Save your brain cells for later, trust me!
For me, my doctor calculated it starting from the very first day of my last period (LMP), not the day we actually conceived. That's how my ultrasound dates were also matching.
Beta, old calculations always start from your last period's starting date. Keep your body cool with coconut water and don't take stress about these calculations. Your doctor will tell you the exact due date.
I remember getting so confused about the weeks and months! Standard way is counting from day 1 of your Last Menstrual Period. It feels long now, but soon you'll have your toddler running around, so enjoy this phase.
