wanting to give up on life

2day i just feel like giving up o life.....looked in the mirror and whati saw looking back at me was disgusting....i hate the way i look...i hate the way i feel about life...i ffel like a failure....i feel like nothing...like im un-worthy of true happiness....sometimes i want to lay down and never get back up....im 24yrs old and i cant even give my fiance the baby he want.....just cant understand why my life seems to be cursed....why am i being punished? why cant i get pregnant? why do i feel so down? i really dont think im going to make it through this dark time.......