TW: Self harm, Su*c*de. 

I was diagnosed Bipolar in 2019, after a 30minute session with a psychiatrist I had never interacted with before. I was immediately given antipsychotics in addition to anti depressants. I have been changed from medication to medication and have been on Lithium and Duloxetine since the end of 2020. 
In 2020 I was diagnosed with BPD after being admitted to the hospital. Upon researching BPD, its triggers and the way it manifests everything started to make sense. 

All of my symptoms and my thought patterns aligned with bpd. However they would not remove the Bipolar diagnosis and instead said that I had both. I was inclined to believe them, but as time went on my symptoms worsened no matter how diligently I followed my medication  regime. I have also gained 40kgs since I started lithium and  with a history of disordered eating this has had a huge impact on my mental health. 

I reached out to the mental health triage at breaking point and they pretty much refused to help and just told me to get another mental health care plan from the gp. They said I probably wouldnt get to see a psychiatrist for reassessment because they didn't feel I needed it urgently. (This is after I explicitly told them I was seriously contemplating suicide and self harm)  

I decided to wean off the lithium myself slowly slowly see if it effects me. I haven't taken it in over a fortnight and I feel so much better already. I dont feel foggy and slow, I am anxious but I'm also able to think clearly enough to be able to process those feelings, and I've already lost 2kgs. I'm seeing the gp today, I dont know whether to tell him I've stopped taking the lithium. I'm afraid he'll just try to convince me to take it or try to put me on something else. 

Im not asking for medical advice, Im moreso just curious on my options from a legal standpoint. 
Can I opt out of being medicated? Or can they legally force me to be on medication? I'm in Australia. 

Thanks for reading this far.