BH are not always painless for some. I had pretty bad ones when pregnant with Lily and have had horrid ones since about 20 weeks this time. I've heard they can be worse 2nd time around. I get the back ache to go with it too this time. It's not nice. The only thing i;d be worried about is if they got regular and closer together. Otherwise they are just probably BH. The joys of pregnancy huh?