UPDATE: Period 6 Days Late

Cheyenne
My period was supposed to start on the 7th. 
On the 6th, I took a pregnancy test- negative result. 
On the 12th I took a pregnancy test- negative result. 
TTC for 3 months now. 
Experiencing nausea, dizziness, fatigue, cramps, increased appetite, moody 
I'm not sure what to do to!