Hi MrsW.. some of your options are..
stay where you are & still have a job after 12mths & get PPL & keep your job. I think the it is around $4200 for the 14 weeks not 100% sure.
You can take a job for 12mths. She may come back & you have no job or they may not renew your contract so again you may have no job. You may not fall pg in that time either, something to consider.
You may fall pg, take the 12mth job & have baby before it ends. You may leave pg at the 12mths. You can get a pay out for about $1200 if you are not entitled to PPL.
The 12mth contract is a risk so I would be more inclined to take it if you are not bother about having a job after the 12mths.
good luck with your decision