Nausea
Nausea or morning sickness is one of the first signs women notice when they are three weeks pregnant. It may lead to vomiting or may stay in the abdomen as feelings of nausea or aversions to some foods.
Fatigue
Fatigue occurs quickly within the first semester of pregnancy. Women at three weeks pregnant may notice that they are more tired and need more rest than they previously did or may not feel rested after a night of sleep or a nap.
Cramping
Cramping is normal in the first three weeks of pregnancy. At the third week mark in their menstrual cycle, women would be about to menstruate and so the cramps my be misconstrued as menstrual cramps.
Spotting
Spotting is normal during the early weeks of pregnancy. It is normal to have spotting when menstruation should occur, but it will not be as heavy as a normal period. Spotting may also be due to the fertilized egg implanting into the uterus.
Urination
Even as early as three weeks pregnant, urination will become more frequent. The uterus expands slowly, but begins to do so right away and will put pressure on the bladder.
Breasts
Breast changes may occur at the beginning of the pregnancy and as early as three weeks. They may become tender and the areola may begin to darken.
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