Is it too soon?

I am not due for my period until next Thursday. However I am having terrible back pain and cramping now with sore breasts. These are symptoms that I usually have when I'm menstruating as well. However it's a week early. So I'm like ok is this early signs of pregnancy? From what I read it could be. So I'm 7 days before my missed period and I decided to take a test. It was negative. Should I just hang it up and try for next month? Or do you think it was a bit too early to take a test?