I have to admit that my results from consecutive FET cycles just got worse and worse, but I am fairly convinced that was down to the declining quality of my stored embryos (they started with the best and worked their way through) rather than the fact that they were consecutive cycles.

If you're not comfortable with transferring at this point with things seeming a little wonky, then don't. While ever that embryo is still in the freezer, you aren't locked in to transferring.

BW