FTM water broke??

Amy

First time mom here- 37 weeks tomorrow, and I think my water just broke. I’ve been wearing pads because I’ve had some extra liquidy discharge lately. I just showered and laid down and I felt a bubble of pressure pop then enough liquid came out to soak my pad, my underwear, and a little on my pj pants too. I didn’t feel any contractions at home. Luckily we live right by the hospital and I think I’m starting to feel some? Please be kind I don’t know what contractions are supposed to feel like and idk how much fluid I should expect when my water breaks? Currently in the parking lot of hospital but waiting to hear back from the on call OB. What do you guys think??