Help!

So my period isn't due until the 11th, but I haven't had any of my normal pre period symptoms (cramping, insane cravings, etc) instead I'm getting extremely nauseous, throwing up, etc. I just got married in May, and I have been consistent with my birth control for the most part (only took it late a couple of times, and only missed a day or so) I've taken a walgreens pregnancy test because I thought I was late, but it's negative. Would it be too soon to tell??