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It is not necessary that all women should experience symptoms of early pregnancy. Few women experience them as early as 24 hours after fruitful intercourse, few women start experiencing them after having a missed period, and few women do not experience any symptoms at all. Early symptoms suggestive of pregnancy includes fatigue, constipation, increased sleep, hunger and tiredness, mood changes, headaches, back pain, lower abdominal cramps, increased frequency of urine, breast soreness, nipple sensitivity, blue veins on breasts, pelvic discomfort and heaviness, food cravings, increased appetite, sensitiveness to smell or certain foods, dizziness, increase in vaginal discharge without any foul smell or any other associated symptoms like itching, burning rashes etc.
Take care.