I'm 34 weeks pregnant and began having a stabbing pain on the left side of my back Friday morning. It literally left me breathless and hardly able to walk. I went to the doctor and she felt I was just sitting/standing incorrectly. She told me try a heating pad for the pain. I laid on the heating pad most of the day and the pain started to go away. Throughout the weekend the stabbing pain has come and gone. Should I be worried? Or is this sharp pain truly from just sitting/standing incorrectly? Thanks for your advice!