Any advice would help

So first off me and my girlfriend are starting our first month of TTC in 10 DAYS (well if my period comes)!!!! I have a cycle length of 29 days I'm never late and always start my period when I'm suppose to well my period was suppose to start 2 days ago which it hasn't. Since I havnt started my period on all 3 of my apps my fertile window keeps getting pushed back? But as I stated before my periods are ALWAYS on time, there's absolutely no chance I'm pregnant unless God magically blessed me to get pregnant without sperm 😂😂😅 Has anyone ever had this happen and did their ovulation date still fall on its original date? Like why does it have to happen the month we're trying to conceive? 😔