Preterm labour

So I’m 31 weeks 1 day, I’m measuring 1.5 weeks ahead according to midwife, and over the past couple days I’ve been feeling very sick, and nauseous, I’ve had a really uncomfortable back and pretty sore and uncomfortable stomach/cramps and frequent Braxton hicks. Ive felt a lot of pelvic pressure and baby moving around a lot/ kicking my ribs. I’ve been constipated but needing to pee quite a lot. And I’ve just woken up and felt a trickle of fluid going down my leg which I don’t know if it was accidental urination.

Plus I have had this strong feeling he is going to come early and my mum was 6-7 weeks early with her first.

COULD THIS BE THE START OF PRETERM LABOUR?