AF 10 days late?! HELPPP??

Victoria 💙🎀

Okay y’all, here is my current situation. I’ve only taken 1 test and got a BFN at 5 days late. I’m nervous to take a second. November was a super hard month on me TTC #1. AF is always regular. I never miss. I did have flu like symptoms for about a week right after my fertile window. Could that cause AF to be late?