Amniotic fluid or discharge?

Werdah

hey ladies! sorry for the TMI photo but I would love some insight! is this just regular discharge or amniotic fluid?

I've been having it since morning, it's clear but kind of slimy (?). I get it when I'm lying down and get up or when I'm sitting for too long. I'm 39 weeks and 5 days so I'm just wondering if I need to call my midwife or not?