This is when many women "miss" their periods, and consequently realize that they are pregnant. Your basal temperature will be high for a while, and this can cause feverishness and weakness similar to those you experience when you have a cold. Due to changes in hormones, darkening of the areola and swelling of the breasts may also occur.
The uterus becomes larger and you will sometimes experience discomfort in the lower abdomen and back. Some mothers will start having morning sickness.
The fetus is now about 2 cm long, its heart has formed and a heartbeat can be confirmed.