I understand, but I am in a different boat. When i had my DD, I had hoped desperately for a son. My two SIL's then went on to both get a girl and then a boy in quick sucession, while my second child was a DD also. I felt so jealous, so envious and for years put off having another as I so desperately wanted a boy. Don't get me wrong, it took me some time, but i fell for my DDs hook, line and sinker and wouldn't trade them for anything. But i so wanted a son. I felt so cheated that others seemed to get this so easily.
5 years later we tried for another baby (DH not minding girl or boy, me fretting HUGELY about hoping for a boy) and with number three came our son...I am so glad he is here, he is my little boy i wanted for so long, and I am just as glad my girls came first as getting to know having daughters has been really amazing.
What i am trying to say is that i know how scary it is trying again. But you will be okay either way, really you will, because our own kids tend to have a way of making you fall for them even if the parcel we receive is not what we expected. The way I got to trying for number three (or number two in your case) is knowing that I would always wonder if i didn't try again. And having, somewhere deep deep down inside, faith that if i did have another DD that i would have the love she needed to be raised healthy, happy and strong. I really hope this helps, even if just a little.