water leak?

Madeline • 24. Single mother. ✨
40 weeks exactly. I've had a pad in tonight because I thought I was having a lot more wetness than usual. My question is how
In the world are you supposed to tell if it's water or not?? If it's clear and odorless how does a pad help? 
I can tell the pad is wet but I can't tell if it's discharge or my water. I'm GBS positive so I need to go to the hospital ASAP if this is my water. Can anyone help me out? 
I've also been having inconsistent cramping and contractions all day.