Sorry that she is going through this. Perhaps just start with one therapist and shop around if necessary. Like others mentioned on another thread, perhaps this isn't the right time to start trying to conceive. The end goal with pregnancy is to bring a healthy baby into the world.
The pregnancy is the easy part as far as raising kids goes. What about her thoughts on child rearing? Does she have any parenting skills in mind for raising kids? Maybe beginning therapy now could help heading into the possibility of post parthum depression which I'm personally concerned for her on that side of things if she's having these thoughts at this stage.