My friend said she missed her period for September but her August period only lasted 2 days the first day was spotting and the second day was a very light flow that lasted for about 3 hours the most. She didn't even have to change her pad. She said her cycle is usually heavy and last for 5 or 6 days. She got her first positive test on 9/29. So do she count those two days in August as a period or a missed period the first day when the spotting occurred was 8/26.