Tests are never 100% accurate, but 99% yes. Well, after 2-3 days they show. But my advice is best and for the safest go to a gynecologist. If the test shows that you are 100% pregnant, it is true, but if it does not show that you are there, it is no longer certain, you may or may not be.
1 ducksick69u answered
You can use it a few hours after sex or it is best 2-3 days for greater fidelity. However, it is recommended that when you use the test in the morning - the first urine has the highest amount of hormones and therefore the test is more reliable.