First just want to say how sorry I am for your losses. I know exactly how you feel.
Ah, yes. The crystal ball. Wouldn't it be nice to know if this time will be it?
What burns me up is that no two docs give the same advice on the 'best time to try again'!!!!! I mean I understand that no two people are the same blah blah... but do they give out different advice for people with a head cold too? NO, they tell you how to take care of yourself, 'drink lots of fluids, turn on the humidifier, etc. etc. When you mc you could see 15 diff docs, run all the same tests with all the same info and get 15 diff stupid answers. It seems they've all got the standard, 'sorry you're just unlucky' response down pat. Cant they just all agree on a standard reponse for when to TTC again. Obviously, outside of extrenous circumstances, but geeze lueeez!!!
My first mc I had a female doc who said, I should wait 3mths for the lining to build up. This time I've got a male doc who gave me a blanket response, that was something to the effect of, 'well, you could try tomorrow if you want to, but it's better if you wait 1mth, and better still if you wait 2mths.' Then when I went in for my follow up, he said, 'you should wait for one cycle'. Okay, so I'm thinking of a number between 1 and 3. That's the best time.
As for me, I'm jumping in head first. TTC, and putting lots of hope into my next

Because the truth is, if it's to happen again, it will, even if we wait an eternity for our lining to build up!! We're still taking a gamble, just like anyone else... only now our odds are a little different, and we've now seen the other side. That's really what sets us all in a spin, its the feeling of having no control over it all anyway. No matter how hard we try.
I say it sure would be nice to take some comfort in knowing that we're doing the best thing.

P