Late... could it be??

I got off BC in December and DH and I have been TTC since. I know it can take a while for cycles to regulate... but my first was 34 days. I'm now 3 days late and the only possible sign of AF is some mild cramping. I've been fatigued, nauseous off and on, and moody. Thought it was just PMS but now I'm not so sure. Tested yesterday and got a BFN. Do you ladies think it could still be possible I might be pregnant?? Comments/insight appreciated! Thanks :)

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