Water broke?

Jenna
I'm 39w5d So I was letting my dogs out and haven't gone to the bathroom yet so I was doing the pee dance and then uncontrollably it came out a little. Took my underwear off and realized more mucus plug came out. I had lost a big chunk of it yesterday. So I proceeded to go to the bathroom thinking nothing of it and change my underwear. Well I smelt the wet spot and plug and it had no smell and my mother is convinced that my water leaked because I had liquid come out when the rest of my plug came out.. I have a doctors appointment later this afternoon but I'm about to call them and ask if they have anything sooner so I don't have to drive to the hospital twice today. It's a half hour away and makes no sense to make two trips if it ended up not being my water and she's just going to check me at my appointment anyways. Anyone have any similar stories or advice?