Nauseous. Too early to test?

This morning I woke up feeling pretty nauseous. I ate some cereal and it went away but now it's back. It's weird though because it doesn't really feel like I'm going to throw up just queazy I guess. My period is supposed to be in 4 days. Is it to early to take a pregnancy test? My husband and I have been officially trying since January so we'd be so thrilled if I did get pregnant this cycle.