I had this last week and was told (several days later at my usual check up) by my GP it would have been stretching and/or BH, although I wasn't having tightenings

Are you noticing your tummy getting hard with each one?? Are they coming in reg intervals??
I'd say if they are fairy regular and you are getting tightens with them you might want to get it checked out.

I think more than likely it's just BH, your body getting ready for the real thing, which can go on for weeks and weeks, but if you're really worried it's always best to go for a check up!

Good luck with it all.