HELP! I think I'm pregnant?

for the past 8 days I've had some symptoms that I think are pregnancy related. I have been congested (constantly blowing my nose), nauseous and starving all at once,hot and cold at same time, very tired all the time,but can hardly sleep. I pee (like clockwork) every hour and a half. My don't hurt but my are very sensitive and always hard(tmi) can anyone help?