Early detection, testing too early?

Posting again because I believe I posted in the wrong topic twice (& don't know how to delete then), I'm not used to this app yet!..

Is taking a early detection pregnancy test a week after unprotected sex too early? I have showed symptoms of irritability, change in moods, slight cramping & backache, increased acne, nausea, & also indigestion/jumpy Feeling in my stomach.. Not sure if that is a sign or not. I just can't stand waiting two weeks & can't rely on my period to miss (cause mine is almost always late or at a diff date every month). If you know please comment, I don't want to get a inaccurate result either.. I plan to schedule an appointment with my gyno if I get a positive result.. Just wondering when is too soon to actually take the test...?