I've started to have symptoms -- tired yes, but also crampy starting today it's a bit worrisome (6 days post 5 day FET). I also felt very strange,headache-y and weak on Saturday. Better yesterday. I figure either something began to take Saturday and then failed or something may have implanted on Saturday and then another implanted late or is implanting as I type. I know, I know I'm over interpreting but it is SO hard to just sit and be patient. I have four wonderful IVF babies -- two donor -- and did this cycle because we felt morally we wanted to give the frozen embies a chance. It won't be the end of the world if it doesn't work so I'm a little more philosophical than in the past but I do find myself hoping and fantasizing.