Late and Negative :/

Anna • 31. Married. Mother to DD after TTC 3 years. Have been TTC #2 for over 6 years now.
Ok ladies, I don't know what to do or think! AF was due the 24th. Took a test 2 days ago. BFN. With my first pregnancy I didn't test positive with an HPT but went to a clinic the next day and tested positive with a urine test there at 7 weeks. Am I out? Is it like my first time and I wouldn't test positive even if I was? I'm not stressed. I'm actually the least stressed I've been in years. I'm not overweight. Or have any issues that would prolong my period. Any one have any stories of getting a positive HPT quite a bit later after their missed period after BFNs?? Thanks in advance!