I am sorry to hear this but things can work out fine in the end.
My ex manager was 45 when she got pregnant with her son and they thought the scan showed something for her too, she had further tests and was so scared and when she had her baby, he was perfect ;-) and no matter what the outcome, u will love that baby and u will cope cos ur a mum ;-)
Hoping that it all works out for u and baby xxx