With my first my waters broke, for me it was undeniable as they continued to leak constantly. I called up, they asked me to put on a pad and went in for them to check the pad (for meconium) and do my obs. I was told to go home and labour at home, if my contractions did not start after 24 hours I was advised they would recommend an induction
Mine went bit by bit in the middle of the night. Started as a light trickle. I went in, they did my obs and it turned out I was 9cm dilated so had been on labour without even realising! I had my son 9 hours later! X
If you are gping for a natural birth, you will not need to stay in hospital until your contractions start. If nothing happens in 24 hrs , they may want you in to monitor baby