So very, very sorry to read the terrible news. After all you have been through (the previous attempts, operation and immune stuff) you really did deserve this cycle to work. I'm really heartbroken for you.
It's just not fair and IVF feels like a huge lottery with some of us just not ever getting the winning ticket. Words are just not enough at times like this.
Please IM me if you would like to vent. In the meantime sending a big ((HUG)) to you and your DH.