I'm 28 weeks pregnant and have suddenly developed terrible backache. I googled it, but it doesn't really fit with any of the types of backache described (ie it's too high for sciatica etc.) It's kind of the other side of my belly button if that makes sense and worse in the morning when I wake up. My arm often feels like it's just about to come out of the socket at the shoulder too! What can I do up make this less painful?!!