Thank you for writing in to the forum and presenting a really important question. At the moment, each calendar year you can get a renewal for your BetterAccess sessions which is often not enough for many people. Topping up sessions can be expensive and for some people, unattainable. There are organisations called Primary Health Networks across the country (there are 31 of them) and they fund mental health services that sit along side of Medicare. These supports are generally for vulnerable people or those experiencing financial hardship.
They often have central intake services that can offer you advise on other funding they may have that you could access. For example, they often have funding for people who are at risk of homelessness or who live in rural and remote postcodes. You can try to call your local Primary Health Network and find out if there is any mental health services that you are eligible for. You can find out where you local Primary Health Network is by going to this page.
You can access some services that aren't as intense if you are feeling ready for a different level of support. I have listed a few below that you might discuss with your current psychologist. I also suspect at the headspace centre you are at, you may be able to access Youth counsellors but it would be different than the psychological level of support you are used to.
An option that some people find really helpful is a National program called Mindspot. It is free phone and online treatment using a Cognitive Behaviour Therapy approach for people with stress, low mood, and worry. You connect with a Mindspot counsellor however you have to be over the age of 18 to access most of these treatment programs. You can visit the Mindspot Clinic by going to this page. https://mindspot.org.au/
There is another free program that has been Developed by Beyond Blue called NewAccess that is available in some parts of Australia. You can find out if this program that supports people with low mood and worry is available in your location by going to the site. https://www.beyondblue.org.au/get-support/newaccess
These are just a few of the supports that are available but your local Primary Health Network may have others that they have funded in your area.
Wishing you the best and hopeful to hear of others experiences,