Contractions accompanied by chest pains?

Danielle
I have felt tight in my lower back, and been having what I think is BH contractions...but now I am starting to feel what is a tightness or pains in my chest. 
Does this sound "normal" to anybody else? 
This is my 3rd pregnancy, but I was induced with my other two before I exeperienced any kind of pre-labor. I feel like a FTM because I have no idea what to expect