It has been a week and i have not started my period and i am constantly urinating and had soreness in my breast a week ago but now they bearly hurt could i be pregnant?

Yes you sound like your pregnant, go get a test and because you are a week late you can get a cheaper one. A late period and breast tenderness could mean you are pregnant. You should take a home pregnancy test, it's really the only way to be sure unless you start your period. If you are not pregnant, then the frequent urination could mean you have a bladder infection and you should see a doctor to get it cleared up.