Period is 3 days late

Genesis • Mom of 2 hoping for #3

I used to have a regular period my app used to be very accurate but for the past 6 months it's been unregular every month I get excited and then comes the negative test. Dont know what to do any more, took a pregnancy test this morning and is negative once again. Doesn't hurt me as much anymore to see a negative test but starting to give up.