I've only known one person personally who had lasting complications from delivery, but hers was very much the exception, not the rule. In her case, as a child she had radiation treatments due to cancer which damaged the tissue around her perinium. She had extensive damage during delivery due to poor blood flow, again from the radiation exposure as a child, and she had to go through reconstructive surgery later. So, that is kind of what it takes for things to not go back into place following delivery. Has to be pretty extreme. I've delivered 3 children, all over 8 1/2 pounds, and all ended up just fine. It will be okay.