I've been having some really bad shoulder pain since last night. It started just behind my shoulder blade, and when I got up this morning, it's my whole shoulder now.. It comes and goes, if I don't move it to much. And I use to have pain behind my shoulder blade before I was pregnant, but the pain use to go away after a little bit but now it doesn't. and now that I am I'm just worried if it's something I should be considered about..