Missed period but...

cassidy • Mon, Jan 14

I had unprotected sex the last day of my period in October. I had my period in November and then very short in December and now my period is 10 days late. HPT said negative but I've never missed a period before. I'm sure that if I were pregnant it would show on a test by now, given I would be around 10+ weeks. Just hoping for some answers or common stories :)