What does it mean??

Breanna • Marine Wife 💍 8/6/14, 2year old boy👦🏾8/17/14, angel baby👼🏾3/7/16, angel baby👼🏾9/1/16. RAINBOW BABY 8/14/17👶🏾
I've been cramping for a week and nausea. I've taken three pregnancy tests all negative. But today I actually felt like throwing up and when I wiped after using the bathroom I say pink in the discharge. What does that mean.