3 days late

Ashley • Army wife, dog mom, pregnant with my rainbow baby due October 4th🤰🏼🌈
So my period is 3 days late ive taken 2 test already and they were the first response ones and they both came up negative....me and my SO have been trying for 7 months now and were hoping that were finally pregnant but I'm just getting confused as to y I've missed my period which are normally very regular and still getting a negative test....i no stress can delay it but I'm not stressed If anything the complete opposite