Might be pregnant, need help!

Hey y'all. Me and my boyfriend had sex a week ago, no birth control whatsoever. And I didn't realize it then but when we did it I was ovulating. It's too early to take a test, still have a week until my next period, and too early to have any obvious signs. But I have been having hot flashes, been really hungry, and moody. Have any of you mothers had those symptoms when pregnant? When was your earliest symptoms and what were they? Please help.