Water? (Maybe TMI)

So last night I was sleeping and around 2:30 I woke up because it felt like I was peeing, I went to the bathroom and my panty liner was wet and it didn't smell like pee. I've been wearing a panty liner all day and I've only had brown discharge, I haven't had contractions but I've tried to get ahold of my doctors office and they never answer the phone. Could it have been my water or what else could it have been? I'm 38 weeks and 3 days and I'm 1 1/2 cm dilated.