When you go to take a prenancy test how long do you have to have it in for because i get confused when it comes to it because i never know how long you should count for and how to count it as each ones is different, so do you count it slowly or fast??

The pregnancy test i took, said i had to wait 3 minutes, i times it n i took 8 tests to make sure they were wrong. but i would use a timer n time 3 minutes depending on the kind of test, some are 3 min or some a 5 mins