Water broke or pee ?

rachael • 26. NY. Due sept 17' ❤️👶🏽 baby Jackson

I had a good amount of liquid come out of me this morning followed by a big mucus plug. So I went to the hospital but they tested me and said it was negative and that I prob peed myself. It didnt look or smell like urine and I have never been close to peeing myself once this whole pregnancy .. I’m so mad because I had gone to the bathroom a bunch of times before hey tested me so I feel like there was nothing to even be testing in there

If it happens again im Afraid to go back and get sent home again

Is this likely that the test can come back negative even when it is is in fact my water ???