How early can you get a positive pregnancy test after intercourse?

We I’m really pregnant !🤰🏽 My line is a little faint but still positive I’m very early in my pregnancy as pregnancy goes on it will get darker and HCG is progressing if you zoom in the test you will see positive line it’s hiding everyone says I’m having a baby girl 😘👶🏽💕

Can you still get a positive test later if you tested too early and got a evap line ?