In the first instance, keep talking to your GP, Book a long appointment. if you need, take a letter or list of your concerns, so you don't forget or become nervous about asking anything. No questions you might want to ask are stupid or silly.
I really struggle with these things.
I have to keep trying, though, because if I don't my questions and concerns never get answered. I go on worrying, day after day, week after week, month after month... I'm sure yu know how that feels.
I've been trying to find a phone number for SA's Health for people to phone if they have any questions, such as you do. I didn't find that. But, there is the National number 1800 020 080. I had phoned them once. I realised I must remember, if it is necessary, to be clear about where I am, because I had been given a phone number for the wrong state. Phoned back and got the right number I needed.
Be warned, you will likely hear some pre-recorded message about getting vaccinated.
I'm sorry I cannot help you more. I hope someone else who reads your post will.
You are welcome to come and chat anytime.