One day after intercourse would be way too early to have pregnancy symptoms since it takes around 6 to 12 days after the egg is fertilized to begin getting pregnant.
Pregnancy symptoms can begin as early as 4 weeks but not in one day.
Signs of pregnancy include cramps that resemble menstrual cramps and implantation bleeding as well as Tender, Swollen Breasts, Backaches, nausea, Vomiting, morning sickness etc.
To get an accurate result on a pregnancy test you should wait until 4 weeks after having intercourse before taking the pregnancy test.
If you did get pregnant you should begin having implantation bleeding, Menstrual cramps and the other signs of pregnancy.
One day is way to early to know whether you've become pregnant or not because the egg and sperm would not have time to fertilize.