It could be BH.
My contractions were more low pain. Right down there & back pain with my last two.
I don't know how to describe it, but I knew exactly what it was, its just knowing if its real or pre labour I had problems with.
I'd start timing to see if there's any regularity.
If you lay down & it slows/eases its probably pre labour. If it keeps going it might just be the real thing.

Good luck girls!!