Experiencing a miscarriage and some back pain...when to be worried

I posted earlier this week about being concerned about a pending m/c, and sure enough, I'm having one.  I was early on, about 4 wks (thought not exactly sure, I was never able to get into my OB before this.  I had just figured out I was pregnant the day before Christmas Eve), and now I've been bleeding medium/heavy for about 2-3 days with lots of craps (I can handle them so far).  Yesterday I started to experience some back pain.  I know, usually, lower back pain is normal and shoulder pain is to be concerned about with a potential ectopic, but my pain is really in neither location I guess you could say.  It's located more in the upper left, near the shoulder blade, almost feels like it's on the back behind the heart.  It's not a constant pain, nor does it really feel much like just a pulled muscle or something because there is no pain when my husband or I put pressure on the area.  I notice the pain moreso when I sit up from laying down or bend over.  Has anyone ever experienced this before?

[jenstam]

You could always call an OB nurse or doctor and tell them what you're experiencing and they will tell you if you need to be seen or not. I called with bleeding and back pain and they told me to go to the ER right away. I was having a MC I knew that, but they checked me over and took my blood to take my levels and such. You don't want to mess with an eptopic.

[nanis]

I know that shoulder pain with bleeding & cramping CAN be ectopic.I caught mine on time.And was treated with methotrexate.If I were you I'd go to the dr.Even if this is NOT ectopic & just a m/c you should still get seen.Ectopics are very serious even life threatening.I felt like a ticking time bomb.Plez go get cheked out.Nanis