This is scary

Okay, I'm scared. I'm at 13 dpo, and my average luteal phase is 12 days. Either my average is wrong and my cycle is trying to become normal (14 days is a "normal" luteal phase), or I'm pregnant. I really don't feel pregnant though. First, I took a preg test yesterday and it was negative. Also, my breasts don't hurt at all (which is strange because they usually do before I start my period). I know my temps will come crashing down tomorrow and I'll start my period immediately. But coming this close is just brutal.