PMS or intense hunger. If your period is just late, you may be flooded with premenstrual anxiety. If you are pregnant, well, there are those hormones making you feel obsessed. When you suspect that you are pregnant, it does little good to know that we live in an era where we get to know the results relatively swiftly. I swear I know exactly when I conceived, both times.
Many women just have a feeling.
Perhaps it's a change in the body, perhaps it's something larger than that. Of course, intuition is often wrong, and probably just as often, women think they're pregnant, and they are not. 2. and 3. There's the doctor's office urine test, and there's the laboratory urine test. Of course, you'll need to go in to the doctor's office or the lab, and they sometimes make you wait until your period is a week late.