Sayang, with your cervix already open 3cm at 27 weeks plus water loss for 2 weeks, this isn't something to just monitor at home, please go to the hospital or call your doctor straightaway , even if the pain feels mild right now. Better safe than sorry with baby at 27 weeks. A few of us mums have been through situations like this, and honestly, the doctors need to check you properly to make sure baby and you are okay. Jangan delay, go now!