Women trying to conceive often try to find out as early as possible whether they are pregnant or not. They hope that they are pregnant, so they desperately try to interpret any physical signs before or shortly after missing a period to being pregnant.
Try the OPT Online Pregnancy Test and find out whether you are pregnant or not.
And if you are pregnant, then the pregnancy test is usually positive after you miss your period. Many women with typical pregnancy symptoms turn out to not be pregnant, and many women without these symptoms turn out to be pregnant. For each pregnant woman with symptoms there are many more who turn out to not be pregnant.