It's very simple, just count from the first day of your last period. You can easily find free pregnancy calculators online to track it, but your regular doctor visit and ultrasound will give you the official date.
Usually, doctors calculate it from the first day of your last period (LMP)! 📅 Every 4 weeks is roughly one month, but your scan will give you the most accurate baby age. Congratulations! 🎉
Beta, traditionally we count from the date of the last missed period. But these days, doctors do proper scans to tell you the exact week. Go see your gynac and they will guide you perfectly.
Calculating by yourself can sometimes be confusing, especially if your cycles are irregular. It is always safest to go by the dating ultrasound scan report that your doctor does in the first trimester.
Honestly, I used to get so confused between weeks and months! Just tell people the weeks because months make no mathematical sense in pregnancy. Your doctor's scan sheet is the only thing you should trust.