False negative?

So I took a pregnancy test a week ago & two more today & they all came back negative, but I REALLY think I am pregnant. I don't have any of the crazy signs, but I didn't get my period, my boobs are deff bigger & a little sore, I've been having mild cramps & feeling nausea (but not actually throwing up) peeing a lot & eating more. I feel like I just have slight symptoms of all these things & obv it could just be in my head, but has anyone else had a negative this far out & still been pregnant. I would be 7 weeks today if I am pregnant.