confused

Hi everyone, I thought I would ask here because I'm just confused! I'm prettt anxious, I just finished my masters and I'm still feeling anxiety from that and this is just adding to it! My husband and I have been ttc for 7 months... I got my period twice in November, a week apart, probably due to finishing my thesis stress, I got it normally agian in December right on time and the length was exactly what itshould've been. I was due agian yesterday, but nothing. Typically when I'm stressed, my period comes early, like in November... but this time I'm late. I've noticed my boobs are sore, but not unlike pms, and I'm having heavy cervical mucus, that's clear... could I be ovulating extremely late? And this close to when my period is due? I did take a test this morning and it was negative... could it be too soon to test?