text: how long after having sex can you show signs of being pergnant? what are some of the earliast signs. could you be pregnant? before you test, read this list of classic clues.  are you pregnant? the proof is really in the pregnancy test. but you may suspect — or hope — that you're expecting, even before you miss a period, if you experience one or more of the following signs and symptoms of pregnancy. these early clues may begin in the first few weeks after conception.  tender, swollen breasts or nipples one of the first physical changes of pregnancy is a change in the way your breasts feel. they may feel tender, tingly or sore. or they may feel fuller and heavier. as early as two weeks after conception, your breasts start to grow and change in preparation for producing milk. the primary cause of these changes is increased production of the hormones estrogen and progesterone. changes in your breasts are often most dramatic when you're pregnant for the first time.  fatigue many women feel wiped out during pregnancy, especially in the early stages. this may be nature's way of persuading moms-to-be to take extra naps, in preparation for the sleepless nights ahead. but there's also a physical reason for fatigue.  during the early weeks of pregnancy, your body is working hard — pumping out hormones and producing more blood to carry nutrients to your baby. to accommodate this increased blood flow, your heart pumps harder and faster. plus, progesterone is a natural central nervous system depressant, so high levels of this hormone may make you sleepy. in addition, the possibility of pregnancy can bring about a range of feelings and concerns that may sap your energy and disturb sleep.  slight bleeding or cramping some women experience a small amount of spotting or bleeding very early in pregnancy, about 10 to 14 days after fertilization. known as implantation bleeding, it happens when the fertilized egg first attaches to the lining of the uterus. this type of bleeding is usually a bit earlier, spottier and lighter in color than a usual period and doesn't last long.  many women also experience cramping very early in pregnancy as the uterus begins to enlarge. these cramps are similar to menstrual cramps.  nausea with or without vomiting morning sickness is one of the telltale signs of early pregnancy. most women feel some sickness around four to eight weeks of pregnancy, but the queasiness can begin as early as two weeks after conception.  although nausea and vomiting during pregnancy is commonly called morning sickness, it can occur at any time of the day. it seems to stem from the rapidly rising levels of estrogen produced by the placenta and the fetus. these hormones cause the stomach to empty somewhat more slowly, which could be part of the problem. pregnant women also have a heightened sense of smell, so a variety of odors — such as foods cooking, coffee, perfume or cigarette smoke — can trigger nausea.  food aversions or cravings turning up your nose at certain foods is often the first hint that you're pregnant. even the smell of some foods may cause a wave of nausea in early pregnancy. one study suggests that pregnant women experience a unique aversion to coffee in the early weeks of pregnancy. meat, dairy products and spicy foods are other common objects of repulsion.  food cravings are common, too. like most other symptoms of pregnancy, these food preferences can be chalked up to hormonal changes. pregnant women typically find that their food tastes change somewhat, especially in the first trimester, when hormones have the strongest impact.  frequent urination many pregnant women find themselves running to the bathroom more often than usual. during the first trimester of pregnancy, this is caused by the enlarging uterus pushing on your bladder.  headaches if you're pregnant, you may be troubled by frequent, mild headaches. early in pregnancy, headaches may be the result of increased blood circulation caused by hormonal changes.  constipation constipation is ano