I've been having BH contractions around 3-4 am this week. Last night it seemed more than that though. They were very strong, with cervical sensation, and lasted more than an hour. I don't know about the spacing because I was really trying to sleep. I do know each contraction was long, over a minute. I kept changing positions thinking they'd go away, but no. This morning I'm sore, especially my lower back, but after about 2 hours worth of mild bh things calmed down.
Today marks 34 weeks. It's too early for this stuff.