What to do?

So I was looking and I think I may have got my LMP wrong. I might of been looking at the wrong month and said it was on the 17th when it really was on the 27th. My Dr. Usually doesn't see you unless your between 8-10 weeks but we were hoping to use our ultrasound as part of our announcement for Christmas. I really wanna get that pic but I don't wanna lie. 

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