I need your opinion!

Hey ladies! I need your opinion. I'm going to attach a picture of my Calander. I had ewcm on the 15-18th. We BD those days. I think my fertility week was off with the app. My period is due until January 8th but I have been having increased back pain and tiredness. I'm a nurse so I'm fairly used to back pain but I didn't work last night and my back still hurts today. Also I have been incredibly emotional the littlest things will make me tear up. This is my second cycle ttc after a mirena removal.