too early?

Our fertile weekend was about 2-3 weeks ago, is it too soon to be feeling any symptoms? I've been nauseous, extreme fatigue, sore nipples, etc. we've been try for almost a year & I'm just hoping it's not my mind playing tricks on me/ my body.. According to glow I could take a test on the 8th, but AF should be due on the 11th. Opinions?