8dpo and wanting to test

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I am 8dpo and wanting to test but already did fmu so I'm afraid I'd get a negative!! Anyone get a faint positive at 8dpo? AF is due the 22nd.

Not many symptoms. During TWW came down with a cold, some mild cramping on right side no blood, I have a dry scalp (never have had before), I just want to eat, nipples were itchy, sometimes tired during the day but insomnia at night, off and on heart burn.

UPDATE : Took a test a 4:30pm and of course it was negative. Woke up around 8:30am layed back down at 12:30 and slept till 4. Its 7:00pm and I'm already ready for bed!!