When you get pregnant after intercourse, you will feel it after about 25 days after intercourse, mainly under the effect of estrogen, you will have corresponding symptoms, such as anorexia, drowsiness, or some people will also show symptoms of insomnia, nausea, vomiting, frequent urination, all caused by early pregnancy reaction. With the increase of estrogen in the body, the breasts will also show corresponding changes, such as the enlargement of the breasts, the coloring of the nipples and areolas, and the nipples will be especially sensitive and will have an erection when stimulated by hand, and the breasts will be especially soft when touched by hand, mainly because of the effect of estrogen.