Preterm labour

Hi guys

It's been 9 years since my last baby, I'm currently 27 weeks, our little one has been very low since 20 weeks and hasn't shifted last night I was getting on and off pains in my back that where so uncomfortable and today I just feel very strange, my stomach is extremely heavy, not had any more pains since half 2 this morning, she's irritated my uterus before and I am just putting it down to that , it's hard to fully explain, what was others experience at this far along,in due to see the midwife next week.