There are several ways to find out if you are in fact pregnant:

A blood test will give you a reliable result, even at the earliest stage of pregnancy. Your doctor will order the blood test that will check for the pregnancy hormone, human chorionic gonadotrophin (hCG) in your blood. You can have this test done as soon as you have missed your period.

You can buy pregnancy urine testing kits from your local pharmacy. Make sure you follow the instructions on the test very carefully to get the most accurate result.

Once you know you are pregnant your doctor or midwife will help you work out when your baby is due (the estimated date of confinement or EDC). There are a few different apps that will also work out your cycle, EDD etc.