Leaking?

Mandy • 29 years old - Married October 2013 - Mom of Baby Girl Dec 2015 😊 Expecting Baby Boy April 2018 ☺️
I am wearing a panty liner but I'm so scared that I'm leaking amniotic fluid. How can you tell the difference between a smushed bladder - leaking urine and a leaking amniotic sac? I have white discharge but the little leaks (not even gushes) are yellow in color. No foul smell. The panty liner doesn't ever fill up. Just small patches. I'm currently 27 weeks.