Do I cancel or go to the specialist?

Tabatha
I am officially 3 days late. I took a test this morning and it was negative. I have an appointment with a fertility specialist tomorrow 2 hours away from where I live. Should I go ahead and go? Or try to reschedule and wait to see if my cycle starts? I did test this AM and got a BFN but still am mot having my normal cycle signs and I normally have a 27 to 28 day cycle. Help!

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