Glad that your OB (whom you adore and trust too, I'm assuming)agrees, so that gives you another opinion. The fact that she has been through the exact same thing AND went on to conceive shortly there after, hopefully that gives you a sense of relief.
It is so easy to second guess ourselves, believe me, I do it all the time. But, with that being said, try to be confident in your decision that this is what you need to do in order to move forward and give yourself the chance at carrying a pregnancy to term. You are in good hands, I'm sure.
Sending you positive thoughts and hugs.