Early labour?

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Any ideas if this could be early labour? The biggest gap I had today between them was half hour since like 9am, they were coming really frequently, but since I had a bath at half 6 they've become very irregular again

I'm 37 weeks exact today and have been having at least an hour of tightenings per day, about 5 to 8 mins apart since Friday

I have felt these in my back radiating through my abdomen, like bad period cramps, then my legs felt weird. Some I've had to breathe through and ask my husband for counterpressure on my back.

I also had quite a bit of greeny mucus when wiping today

Yes could be early labour, try and keep mobile and upright until you would normally go to bed, then try and get some rest as you want to be well rested if you can sleep through them.
Unfortunately I was like this from 40 weeks with DD2 and had this on and off until she was born at 41+2. I'm not saying that to be despondent but just for you not to feel to disheartened if it slows down again. Good luck with everything x