Northern i have been thinking of you often are the horrible ordeal that you went through. Please don't think any of what happened is your fault, i hope as hard as it was to hear they managed to find what was wrong with Evelyn so that at least brought you some closure. Nothing you could have done would cause genetic abnormality, it is just awful luck.
I can't even begin to imagine the pain you are through and i hope you are finding some comfort in your gorgeous boys and wonderful husband who all sound like they have been a terrific support throughout this ideal.
I truly hope by this time next year you are holding a healthy little baby who helps to mend your heart a little (and i will keep my fingers crossed that it is pink).