What is wrong with me....

A co-worker of mine started working with me the end of December and told me 2 weeks ago shes expecting.... She helps me out with paperwork when she is caught up with her work.I have been working 1.6 years and feel like if i would get prego my job would suffer... They r looking for a 2nd person who i can train so someone else can do my job if I'm sick or take vacation and they can take a location.....i feel bad that I need an assistant but with 5 almost 6 locations... I feel maybe once they r trained maybe after August i can go off the pill and try for a family...

But it scares me to death.having a baby inside of me and giving birth... I know ppl do it everyday but still...

How can i get over it and be ready come September. Been married for 4 yrs this July... Hubby really wants kids and I'm deathly afraid... I worry too much....