Help please!! ):

Jess • Fri, Nov 06

So my period isn't due until the 21st of this month. I have cramping in my lower back like it's going to come tomorrow.. I'm so moody and irritable and I want to eat everything in sight. Also my boobs? I can't even touch them without practically crying! I'm at my fertile window.. Could that be what it is? Or is my period coming ?