Confused......

Kerisha • Been off depo since July 2013 sooo TTC #1 since April 2014 :) :) excited!!
I suppose to have period on Sunday. So that means I missed my period tomorrow for a week. I have been nausea tired most of the time. Cramping. Last night my nipples hurts like crazy and it still hurts... Did any of you experience this? Is this pregnancy sign?? Thank you!