Oh Wendy - I have watched your posts and can feel your heartache.
It is sad when it is so easy for others, and you are having difficulty. I know your pain first hand.
No one can tell you when enough is enough. Only you and your dh know the answer to that. I think in the back of your mind - you always will hold out hope that maybe this cycle...... it must be so hard to see the witch AF come when she isn't wanted.
I wouldn't write off this cycle yet while you are still in the tww. It's not over til it's over....kwim?
I know you desperately want to have two more babies. Have you considered adoption or fostering? When one door closes, another one opens. Maybe that's the babies you were meant to be having. Just a thought.
Whatever happens, please know we are here for you. KUP.