Girls, can you tell me something? Tomorrow will be 37 weeks. I had sex…

Girls, can you tell me something? Tomorrow will be 37 weeks. I had sex yesterday. After that, somewhere an hour later, water leaked out. I'm thinking this is just part of the water might have leaked or wait for contractions in the near future? My lower back feels a little tight. Just because I didn't have my waters break in two previous pregnancies, they punctured the sac, so I don't know how it works when they naturally go away.