As icky as it is to think of what you are experiencing is actually urine trapped in your vaginal cavity. As you dilate for the big day your area down there becomes very different and part of that difference are little pockets. I went to my dr several times thinking I had a leak, but it was just pools of urine. My dr. recommended rocking back and forth on the toilet after I pee to try and minimize these pockets.
The test done for amniotic fluid is very precise and incapable of being messed up. They swab your vaginal cavity and then they take that fluid and dry it on a microscope slide. If it is amniotic fluid a pattern like ferns over lapping dries in the crystals, if they didn't see any ferns then it isn't amniotic fluid.
Always good to check though! The other check is if your pad completely fills up in 1 hour, and I mean fills to the brim wet to the touch. You would be amazed how much amniotic fluid you have. Just sit tight, try and get some rest and make sure the baby stuff is washed and ready, you will probably deliver in about 2 weeks if you are having dilating contractions. At 36 weeks they will not stop your preterm labor, your baby is developed enough to survive.