My neck and my lower back/bum hurts Excrutiatingly

I am trying to figure out what to do. I don't know if I am sending this to the correct place so if you know who would be best to help me out please direct me there. My neck and my lower back/bum REALLY hurts! I believe that it is worse than what I should be going through; yes I am pregnant and back pain is a part of the whole thing but it shouldn't be this bad. I am currently only 13 weeks as of December 13, 2009 and this will be my third child; each child up to this point and going forward with the next have all been C-Sections; my back hurt bad with the first two, getting worse with the second, and this one is to the point that my movement has been effected IE. I shuffle across the floor to get anywhere :| sounds would be if it didn't hurt so much. What can I do? Where can I go that will help? Who should I talk to about it (any doctor that I try to describe it to just says it is normal)?

Thank you for your help.