I went to the hospital the first time because I thought I was leaking very slowly (I was overdue though). The fluid test came back negative. The next morning, I woke up at 5am and my bed was soaked. I put a pad on and that was soaked within half an hour. When I got to the hospital they did another test just to make sure (By the time I got to the hospital my pants were dripping because they were so soaked). It came up negative.
The nurse and I were both really confused. The doctor came in and said that my "fore-water" had broken, but there was another bag of water with the baby inside that hadn't been broken. Luckily for me, he broke the other bag of water and let me stay. I was going crazy being an overdue pregnant lady. Lol.
Anyways, my point is... I don't trust those things at all.