I had a FET with a high quality blastocyst last week. Although I was initially quite optimistic, I just knew it hadn't worked from about two days later - I started feeling quite depressed and my uterus felt 'empty' for want of a better word. I tested early today with a FRER because I felt it hadn't worked and it's unsurprisingly negative. I'm wondering whether other people had had similar experiences and instinctively knew from quite early on whether their treatment had been successful or not.