I'm 29+5 weeks and I've been having braxton hicks for awhile now. Mostly they don't hurt just get uncomfortable. Last night I had one at 9:00pm and it got very painful. I got up walked around but that didn't help after 1 min it stopped. I had really bad lower back pain right after. It hurt bad like back labor. It lasted about 30 seconds then was just sore. I drank some water and went to bed. Then at 1:00am I got woken up by another contraction that hurt really bad too. I got up and walked around and drank some water and after 1 min it went away but I had back pain after again. I've noticed that I've had two more smaller ones that just feel like tightening nothing like the others. I called my Drs office and talked to the Nurse and she said as long as I'm not having more than 6 an hour and my waters haven't broke its nothing to worry about. Can't help but be worried. This twin pregnancy is nothing like my last two pregnancies. Its hard not to worry.