Need advice!!!

So I had sex April 30th. Haven't had my period since April 15th, been experiencing back pain a lot really bad, acne, bloating, extreme fatigue, mood swings like crazy, been depressed, sore breasts and Everythin there is. I took a pregnancy test but I believe it was way too early, it came out negative. Should I take another one??!!? I'm still having all of the symptoms! Help please!