I really really feel for you right now - it's all still pretty raw for me at times and I know how rotten you must be feeling. It just doesnt seem fair that after all the crap we've had to put up with to this point that DE should fail. However, please don't give up! Don't even be downhearted! OK, this one failed but it doesn't mean DE will fail you. I know it costs the bleedin earth but if you give it one or two more gos, you should get what you've been longing for. We had such a horrible few days after our BFN, I wondered how we were going to get on from where we were. However, there was never any doubt that we would give it another shot. From what you've posted, it sounds like you already feel that way? I hope so!
Give yourself some time and make sure you don't indulge in any self-recrimination. Sometimes poop just happens. Start planning your next steps as soon as you're comfortable to do so and it's amazing how quickly this disappoinment becomes history. Like I always like to say, this is just another bump on the road to where we're going
Hugs and love,