Late period, BFN

Aunt Flo was due about 16-18 days ago (estimating because my cycle has been between 29-31 days long). I continue to get negative after negative. Last time I tested was last Wednesday when I was about 12 days late.

Is it worth going to the doctor to get a blood test, or should I just assume I skipped AF for whatever reason this month? I have an appointment set up for tomorrow, but really starting to feel like this isn’t our month with all this at home negatives.

Hubby and I have been trying for a couple months so it’s hard to keep seeing those BFN when the missing period was so exciting!!!