AF vs pregnant

Today is the first day of my expected period (nothing yet) but negative pregnancy test, I really thought we did it this month just a gut feeling of “I’m pregnant” just like with my first pregnancy but all signs point to not being pregnant is it possible the hormone levels just weren’t high enough because I didn’t test in the morning? Or am I definitely not pregnant this month? My period has been late 3 months in a row but I didn’t feel like this. Idk guys what do you think?