4 days late, 2 negative tests!

I was supposed to start my period 6/12 and it never came, putting me at 4 days late. I had very light pink spotting for about 3 days last week and have been cramping and nauseous here and there. I took one test this morning (6/16) and one 2 days ago, both came out negative. I tested at 5 days late with my son and it took no time to get that plus sign on the little window. I feel like my body is telling me I'm pregnant, but my mind isn't wanting to believe it if that makes sense.