Hi @Former-Member, I agree with @Former-Member. You seem so distressed in an ongoing way with your anxieties. I too feel it would be wise to go back to your GP to discuss medication and therapy options. As far as I'm aware, PTSD really needs treatment.
I too have have problems with depression and anxiety (as part of my bipolar), and have had decades experience with various medications. In my experience, the main medication for treating depression and anxiety in an ongoing way, is anti-depressants. These should not make you drowsy. In fact, they tend to do the opposite. However, some patience is required with them because they can take up to 8 weeks to really start benefiting you.
Another kind of medication for anxiety is usually only prescribed on a temporary basis. These are benzodiazepines, that can include the most common relaxants and sleeping medications. These would be the ones to avoid as much as possible, as you are doing, because they make us drowsy and are also known to be addictive (so only temporarily used).
In telling you what I know about medications, I would however ask that you bear in mind that I am not a medical professional and it would be best to seek advice from your GP.
Aside from medication, I would strongly suggest you also ask your GP for a referral to a psychologist, hopefully one experienced in treating PTSD. Therapy like this could even help you to be free of the need for medication, as it will teach you skills for managing anxieties and depression, and also help you to resolve the traumas that you have experienced. All Australians are entitled to 6-10 psychology sessions per year under Medicare, but you may wish to ask your doctor to refer you to a 'bulk-billing' psychologist so that your financial situation is not further stretched in any way.
I hope this information is useful. Kind wishes.