All Ncaa Div 1 Athletes

How do u know if its a test for the ncaa or just your school or athletic department?There were about 15-20 people tested recently,all from different sports..2 female nurses,one in mens restroom,one in womens...No official there or anything,our head trainer guy would just come by every few minutes,didnt give the guys any notice,called 'em at 730 said they needed to b there by 8.Any way to know if its ncaa test or not?Oh also i was told the nurses did not watch you piss,had stall to yourself.And we play baseball, kinda early for ncaa to be after us,but help me out