Leaking/discharge

Ke

How do you know if you’re just dealing with liquidy discharge, urine, or amniotic fluid? I just assumed it was normal discharge/urine but then I read someone else’s post about leaking amniotic fluid annnnnd now I’m worried. No docs appt for a few weeks. I’ve had issues for a month or so now though and at my 20w scan they didn’t say anything about babies fluid looking low?