Why Does One Get A Sudden Gush Of Water From The Vagina?

HI, I am concerned b/c I was walking through PetCo yesterday and all of a sudden I had a gush of water/fluid from my vagina. I immediately went to the restroom and noted that it was NOT urine and did not have any texture to it like cervical mucous. It was watery just like water. No odor, no texture. Before this happened I did not have the urge to urinate at all. What could this be realted to? I am 28, healthy, eat right, and actively work out. I closely monitor my menstrual cycles b/c my husband and I have been trying to get pregnant for a year. Any answers?