Symptoms in my head???

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AF is due on July 1 I have been taking The 6 day sooner early response pregnancy tests ever since 10 DPO and I just took one today with FMU...
Have not been experiencing any symptoms up until yesterday at 11 DPO and today 12 DPO I am experiencing some nausea and cramping but keep getting negative pregnancy test
This is so frustrating I know AF is going to come I bd only 1 time and I have PCOS but why am I feeling this 😭😭