6 days late

I'm now 6 days late. My boobs are so sore it hurts to hug anyone or even wear my bra, I'm extremely fatigued, nauseous, increased appetite, and very very moody. I tested yesterday and got a negative result. We were very very active during my ovulation week and I had some spotting a day or two before my period. Then nothing. When should I retest? Or what else could this be?