Hi Keen
Don't worry too much about their stats - as you would say 'stats shmats'!
Yes, it's normal to feel the situation is hopeless when an unsuccessful attempt slaps you in the face yet again. But, you're not hopeless.
The whole IVF journey has no rhyme nor reason and it's just plain unfair. All the more frustrating when there is no 'reason' - you stim well (if not too well in the past), fert rate is good, embies are good, it's just that bloomin' last step of implantation. It's too hard to take. But, as you've mentioned, you guys are relatively young so have time to work out why it's going pear shaped. I know that's absolutely no comfort to you at the moment but maybe try to remember that when the miseries hit - you have youth on your side.
I will PM some info you may find interesting. You may feel it's too soon at the moment to take it in, but save it somewhere for later investigations.
Take care of your heart.
Sue