Hi Meegm
Try not to worry hun. If your egg hass implanted in your scar it would be unusual for that alone to cause you to loose your baby. As others have said your pain is related to your body growing. The scar is not as flexable as the rest of your uterus and this is one of the reasons why you are feeling most of the pain in that area. Also a CS is a major operation and it will take time for your body to recover. I am sure that everything is fine