Getting frustrated!

My period is 3 days late and I've taken at least 6 pregnancy tests (not all in the same day) and they all come bCk negative!! It's been a whole year ttc and I'm going in to see my doctor today to start discussing things and asking questions..but since my periods late I'm not sure what to do. Obviously I'm not pregnant or I'd be getting positives by now....wish AF would stop playing tricks on me! 😢