I'm only on my third, but I don't worry about BH at all. I didn't notice them with my first, did with my second, and now notice and ignore. Well, usually ignore. I find they got more persistent when I did something dumb, like stand for too long, cleaning, and carrying things against my belly. I started to think of them as my uterus giving a protest.
If it is just the top, not painful, and goes away when you chill out and have some water, they probably aren't affecting your cervix, and you could just chalk them up as toning for your uterus.