Confused???

So I did take a test a little over a week ago and it was negative. Then I thought I had started my period on Sunday. However, it's not really been anything like a period. More like spotting, with one day a little heavier than the others. I mean, I only had to use a tampon once! What is going on?! Part of me is hoping that I really am pregnant and just got a false negative. Maybe I tested too soon. I don't know. I think I'm going to test again in the morning, so we shall see! :)