quick question!

How many of you ladies have completely skipped a period and turned out not to be pregnant? And did you ever find out what caused you to skip your period for that month? I have been regular since I started my period, I have NEVER skipped a full month.. Also my period came 9 days late in September and I skipped the month of October completely. The last time I had unprotected sex was August 13.. What do you all think? Because my period tracker is ALWAYS on point and last month in October I was suppose to start on the 21st and it has not showed up. So it has been 46 days since my last cycle. This is not usual for me at all