Is this a sign that my water is about to break?

I'm 37 weeks and baby has become very active and has been pressing down like crazy in my cervix area. Everytime she moves her head or pushes down it stings a bit and it feels like something bulges out a bit in my vaginal canal, kinda like a little balloon inflating a bit and then deflating. On top of that i have been feeling a little crampy all around. Also have pelvic pressure and pressure in my hip bones. Is this a sign that my water is getting ready to break or can break at any time?