I feel a bit silly asking this but i'm 27 weeks tomorrow and for the past 24 hours i've been getting what feels like period pain on and off. The pain isn't enough to take my breath away but it feels uncomfortable and lasts for around 1 minute. It's been happening every so often. Is this normal? I've never been pregnant before so I don't know if this is my uterus stretching more or if it's braxton hicks or something to be worried about? There is no bleeding with it.