someone help, am i pregnant?!

hi! so my period is a week late tomorrow. and i've had these symptoms: tender nipples/breasts, frequent headaches, manageable but random nausea, i've been more sleepy then usual, had little pinching like feelings in my low right side of my tummy near my hip bone, and tugging pains across the whole lower tummy, i've been extra moody, and a little dizzy when i stand up. i really think that i'm pregnant, but i am afraid to get a blood test at the doctor because i'd be crushed if it came up negative...would a blood test be positive by now if my period is a week late and with these symptoms do you guys think i'm likely pregnant?? my last period was in may, around the 16th i believe..