Need advise

So I am 37 weeks 5 days pregnant. I have been having contractions the past couple days to the point I have been tracking them. They are 30 minutes apart on average and lasting 45-60 seconds. Yesterday I was checked and dialated to a 2.5 cm and starting to thin. Baby is completely in my pelvis but Dr didn't say what station he's at. My ankles have been hurting but nothing looks swollen, I have been having lower back pain and severe pelvis pain from him being so low, frequently in the bathroom, slowly loosing my plug, barely sleeping, and been feeling even more hungry compared to forcing myself to eat. So my biggest thing is I live an hour from the hospital so I don't wanna chance waiting tell my water breaks if I can prevent it to go in to be safe, I was induced with my first so laboring on my own is new to me. I plan on heading to the hospital when my contractions are closer to 15 minutes on average apart to be safe. But what are some other signs I should look for so I know I should head towards the hospital??