Leaking fluid?


I'm 30 weeks tomorrow. And the past few days I've noticed A LOT more moisture down there... I'm having to change panties multiple times a day. I'm considering buying pads... any tips on how to tell if this is just pee or fluid? It doesnt have an odor or color. I'm a bit confused but I dont want to make a pointless trip to the er with a dr appt Monday the 28th.