Sounds like your life had hit some road blocks in there before you then being thrown the darn breast cancer curve ball.
It's not clear from your post if you are still living with your husband. If you are not have you been to see centrelink about a wage subsidy and rental allowance? ..Or at least health care cards etc, all things that can reduce financial burdon. Even if together you both may be entitled to this help.
You may be able to access your superannuation due to financial burdon. I was able to access part of my life insurance under trauma cover. It meant we could pay off the mortgage and I could remain off work while on chemo as I was very sick on it.
If you feel well enough you could start applying for full time work now and just give them a future start date. It's only 2 more weeks to go.
As to living with the fear. We all get the fear of return. There is no promise we are one of the 90% that remain cancer free in 5 years. However with some good self talk you can start to believe it. Survivorship is hard, finding yourself again, feeling safe, feeling joy...are all things to work on. You deserve it. We all deserve it.
So think about things you can do you enjoy that aren't expensive. A picnic with a friend. A walk in the sun. Making a special meal with your sons. Perhaps a game night with your family . Try to bring back some fun and laughter into a life that has been full of stress, loss and fear.
Even in a darkest times people can overcome and feel happy again.
https://www.psychologytoday.com/blog/feeling-it/201506/embracing-hardship-surprising-secret-happinessYou can do it. You might just need someone to help you do that if you can't find your way through.
Through your GP you can have a mental health plan completed and entitled to counselling fully covered by Medicare.
You might have mental health services at the hospital you attend that provide completely free services.
Cancer council provide free counselling and can provide practical financial help too.
http://www.cancer.org.au/about-cancer/patient-support/131120.htmlAnd blogging out your fears and worries helps.
We are here. We get it. We understand. Kath x