Yeah that happend to me at 35 weeks pregnant with my first and my water had broke. When i got to the hospital i was 3 cm dialated.
Put a pad on if it gets full it was probably your water, you can also cough but some women that far along pee when they cough.
I was told to cough and if more comes out then I would need to be checked or if I put on a pad and it becomes soaked then it's time to be checked by a doctor.
Call your doctor and just relax some times some water comes out but not all of it just notice contractions