Feeling like giving up?

It's been almost 3 months since I lost my second baby. We decided to start trying again, the doctors cleared us and everything, but I can't shake the nagging thoughts and feelings that we will never have another baby. We have one baby who is almost 1. And it feels like she is going to be our only child. I know that this is probably irrational- I'm young and healthy, I lost a fallopian tube in my ectopic pregnancy but the chances of having another baby are said to still be very high.

Are these normal feelings? Do other mommas who lost their babies feel this way?