Tomorrow I'm going into labor ??? Today is 39 weeks, I woke up with mo…

Tomorrow I'm going into labor ??? Today is 39 weeks, I woke up with more swelling than in previous days ??‍♀️ I went for a scheduled checkup at the maternity ward and after an examination with the doctor we decided it was time! Everything is ready, edema is strong, blood pressure fluctuates - at 6 am I will puncture the water bag and wait for contractions ? While waiting - we're taking magnesium... Who had their water bag punctured - is it not painful at all? Do contractions start quickly??