Jackie, I think your's is going to look fine. I, too, do not have a straigh line but, rather, like you a shallow "S" curve. My surgeon said that when the skin is covered with the special saran wrap like plastic as the team prepares for surgery, the skin gets stretched a little so what looks like a perfectly straight line to the surgeon sometimes takes a different shape when the plastic is removed and skin relaxes. By the time you are a 7 months, it is likely that most people will be unable to see it clearly.
Larry