What is the fastest way to find out if you're pregnant or not?

Get a couple of over-the-counter home pregnancy tests. follow their instructions.

4 weeks after you have sex take a preg test. Look for dark deep blue lines on your breasts when you get out of the shower

Take a home pregnancy test, that is the way to get the fastest results. If you mean how do you get the results the earliest in your pregnancy, then a blood test at the doctors office will detect pregnancy the earliest.

Blood test at the dr.