Congratulations on your bundle of joy !!
Did you have the Western Blot blood test done? That is supposed to be the best although its more expensive then the IgG .. but If you haven't had that one done... I would suggest maybe you go ahead and if that comes back negative I wouldn't go crazy over thinking that you have herpes

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Also, did you go to another derm for a 2nd opinion I am not knocking your doctor but sometimes one may know a little more then another.