Congrats on your pregnancy first of all
. Unfortunately, BH, and even mild contractions are normal throughout all of the pregnancy, and they can come and go. Problem is diferentiating what is to be overlooked and what is serious. If anything inside worries you don't be afraid to ask your doctor for closer monitoring, that's what they are there for. I had extremely mild contractions with my second pregnancy one every few hours, sometimes a day would go by and I wouldn't have any. At 20 weeks, was 5 cm dialated, and had no idea, and went into spontanious labor. Unfortunately, I lost my son, but if I would have said something sooner, maybe there was something they could have done. Always trust your instincts. If it doesn't feel right, it may not be and get it checked out, maybe there is something to be done. Good luck to you!