Can't kick the no baby blues

We just passed the two year mark of ttc and the depression is starting to really eat me up. I've been really good about having my cry and moving on when aunt flow rears her bloody head but this month I've cried everyday multiple times a day sinces the 15th and I just don't think I can pull myself up from this one. I'm entering my window of ovulation on my third round of clomid and even though we are still trying I have zero faith left that it will work this time. Unexplained infertility, what do you even do with that diagnosis? Apparently according to my doctor we just do some cycles of Clomid and then an iui if that doesn't work by its self. But what if all that fails? We are bleeding ourselves dry with the copays, tests and soon procedures. This process has drained everything out of me, I never anticipated it would be this hard. I don't know how to cope with this emptiness anymore. I just needed a place to put this all down, I can't carry it in silence anymore.