For me started like that too on friday from 5.30 am on. They speeded up and slowed down, speeded up a litlle... Nd then 10pm, bam!, bad contaction, a little bit of clear water came out (water broke) and contactions came every 3-5 min (they remained quite irregular for me till the end). 6hrs later Leander was born ;)
So i think: soon! Make sure you have everything you might need packed to go, don't eat heavy meals (my mistake, trying to push baby out one end while food tries to come out the other isn't pleasant lol). And try to rest as much you can! You'll need your energy. And don't feel to bad if they stop completely again, they'll come back with a vengeance lol
Might be false labor you will get cramping after they check you. I was checked yesterday and I've been feeling the same and I'm the same weeks as you. They should be getting closer together if you're in real labor nut you can always call labor and delivery