there is a small percentage of women who's water actually breaks on its own. usually it doesn't til your ready to push. I've gone into labor 3 times and they've had to stop them cause I was to early. your almost 36 weeks so they may not stop them and just let you have the baby. they are letting me now when I go into labor again.
well if they are strong enough my doctor said just go so that way they know if your cervix is changing and so I went in and we were lucky we did because it was. and we were only 34 weeks so they stopped them and then next night had to do it again and now we are still at the same thing if I wouldn't of went in our daughter would likely be here and be here to early. just my story I don't want to make you feel like you have to do it just what we did.
I would call the doctor. they tell you to follow the 5 1 1 rule. but you seem pretty close. so call them and tell them how long the are lasting and how far in between.