Frustrating

So I went on Friday and got an ultrasound and unfortunately there was no pregnancy sac in my uterus so I lost it again. I know that if it is meant to happen it will eventually. We are just waiting for my #'s to go back to 0 then I am guessing we start all over again. This is so frustrating for me but I can only imagine how the mother feels. I hope the third time is a charm and we can finally do this. I hate to feel like I am disappointing someone who just wants this so bad. But I am sure this time there was nothing I could have done differently. I did all that I was supposed to do and I also reduced my stress as much as possible so I know it wasn't anything I did. I am at the mercy of the embryos and my body and apparently they are not cooperating right now I just pray they get with the program.