Congratulations on your pregnancy! Most women don’t know that they are pregnant at this stage, so you are one of the lucky few who do!

How many weeks pregnant isn’t measured from the date of conception, but rather the date of your last period (menstrual cycle). So, if you conceived your baby 2 weeks ago, and your last period was 4 weeks ago, you are 4 weeks pregnant and you are officially in the first trimester of pregnancy.