Abnormal Schedule

I need some help ladies! I am going crazy but not trying to go crazy. I stopped the pill back in July. My husband and I have been TTC since September. No luck yet. What has me messed up is that last month, December, I was 3 days late out of nowhere. Took a test in hopes.. BFN. I had been pretty damn regular too... 29-30 days. So now fast forward to now and I'm going on 4 days late. I have signs of PMS.. Mild cramping, moods, face breakout (mild).. Etc but no period yet. I refuse to take a test and be disappointed again. Any ideas on why I am so late 2 months in a row?!