Second embryo transfer failure

Today I had a blood test and got my BFN after 10 days of having an embryo transfer from a donor. I kind of knew it was coming because I was spotting yesterday and I felt it in my guts.

This is the second time trying this method and the second time it fails. Even when accurately taking vaginal progesterone (Utrogestan) and estradiol (Progynova) and not exercising.

Also, I have Turner's Syndrome so this journey is not easy but I was really hoping this cycle would work.

Any others relating to this or having any words of advice on how to cope or deal with this heartbreak? I'm totally devastated and can barely think.

Please help.