I'm 30 wks pg, and felt period-like pains last night, which hurt quite a bit (definately reminded me of the beginning of labour!), and came in 5 minute intervals. There was none of the tightening that I've heard can happen with BH, so I was a bit freaked out for a while. Eventually took some paracetamol and fell asleep, so I'm presuming they were BH.....
Was just surprised that they hurt, and I didn't get them when pg with DD...