Testing/drinking

I was wondering if any of you ladies might know the answer to my question.
I love to drink water and I drink a lot of it. I consume over 1 - 1 1/2 gallons of water a day. So as of right now I am 3 days late, that is including today. I have taken many tests all - but I don't feel AF coming, but I do feeling like I could be pregnant. So my question is with me drinking that much water will it dilute even my first morning urine???