I need opinion if possible...

Hello! I am; today, 7 days late and AF doesnt seem to be showing up anytime soon... we are TTC from Feb this year and I’m not that hopeful but still. It’s kinda of scaring me that AF isnt here yet because I have never been this late before... in the past at the very most it’ll be a day or two late but never this long.... I tested when I was 3 days late and this morning. Both BFN.. i am nauseous and sometimes the nipple itches (sorry TMI) please give me your opinion... thank you in advanced!