I think a few things...

My donor didn't stim well and they did 2 retrievals on her..also triggered her 4 times and she was proven. The Dr didn't do a guided u/s, never checked my P4 (which I have a history of being low), I got a UTI from the procedure and also had a bronchial infection at the time of transfer..they did not give me any antibiotics...I think all of that contributed to the BFN...my lining was good at almost 14..my only real issues are a mangled tube and High FSH..DH is perfect...we've been pg before..it was just ectopic..I carried it for 12 weeks before it was discovered and had no problems..no pain, no bleeding.
I guess I could have fallen on the bad side of stats..the clinic had a really bad record at that point..lots of BFN'S and chemicals in the months of Sept through Dec...not sure if the Dr was burned out or what, but I thought DE was my "golden" ticket to motherhood..I'm going in to this next phase with eyes wide open..especially knowing that Donor Embryos have a lower success rate.