38 weeks today and questions


im 38 weeks pregnant and woke up this morning and had water that was white dripping down my leg but than stopped after i had a shower ? im honestly new to everything and feel silly but just curious to know what this is? also paranoid as yesterday i was told baby is 3 weeks behind and i get my ultrasound done today to check his growth, my placenta and fluid. My stomach is hard as and im feeling so sore all over my stomach, the slightest touch gives me stomach a burning sensation?