Help me understand

I have been having symptoms of my period starting but it hasn't started. I am also getting symptoms of pregnancy too but I took a pregnancy test and it was negative. I have swollen breast, nausea, slight cramps, headache, back pain, tiredness, and hungry more often. Can you help me understand my chart and when I should be taking a HPT again... Please and Thank you! 
​My last cycle was Sept 23, 2014