possible pregnancy...?

so today is the 6th of the month. I was supposed to start my period on the 1st. it's been a whole week and I haven't started my period.

these are the symptoms I've had.

•nausea without vomiting

•horrible cramps (I don't get bad painful cramps during my period)

•sore nipples/breasts

•fatigue

•mood swings(I don't ever get mood swings)

•increase of appetite

•headaches

•acne

and obviously a missed period.

All these symptoms started exactly three days before my period was supposed to come and are still occurring.