any advice?

Bonnie

ok so AF is due the 17th I ovulated the 3rd had sex days before, day of and even after. all this week i have been an emotional wreck like I had been with my son and my last pregnancy which ended in a miscarriage, also my appetite has gone up extremely. i normal only eat 1 meal a day and this week ive been eating 3 meal and snacking through out the day. i tested yesturday and hot a bfn. could anyone give me some ideas of what might be going on?