Leaking amniotic fluid? Discharge change? FTM

Okay so I’m 39 weeks exactly. I have been having contractions on and off for the past 3 days along with full back ache and cramping. I noticed today in my underwear 3 times over the past 6 hours that I’ve had clear watery liquid. My discharge is normally white or a cloudy white and thicker not as thin. Do you think it’s amniotic fluid or am I just psyching myself out?