Itchy nipples? Pregnant? Lol

Is that one sign of pregnancy??? I know sore breasts are, that's not the only symptom but my period is supposed to be in a week & waiting until(if) I miss my period but I've been EXTREMELY hungry even after I eat I'm still hungry, I CAN NOT sleep I've been waking up two or Three times a night/morning to pee or have bad dreams also very gassy and I'm never gassy!