Are you getting some clues (you think) that you may be expecting, and are trying to realize the first signs of pregnancy before missed period? These signs can be quite subtle - sometimes they are so tiny that everyone will miss them! The key to recognizing a pregnancy before a missed period is to listen closely to your body, and then take what you heard and translate it into solid outcome - yes or no.
My experience has been that most women miss these subtle signs. Often, the signs are right before our eyes, and we dismiss them as an upset tummy, or excess gas, or even a bloated feeling from eating a meat too large for our stomach. To acknowledge signs of pregnancy before missed period requires that a woman be "in touch" with her feelings - and her body! Because sometimes these clues, while present and noticed, are quickly written off as nothing by a busy modern woman of today who doesn't have the time to listen what her body is telling her.