Thanks for using DoctorSpring.com for posting your query.
I have gone through your question in detail and I can understand what you are going through.
Its true that central apnoea can lead to the mentioned symptoms and exacerbate anxiety as well. However considering the fact that you have plenty of anxiety symptoms, accompanied with stressful situations in life nand the fact that anxiety disorder are far far common that the central apnoea, its more likely of you to have an anxiety disorder rather than sleep apnoea. The waking up episodes could very well be panic attacks.
I would still like to suggest you to go for polysomnography, the sleep study, to confirm the things. Most likely this is going to come normal, but still it will reduce your anxiety to a great extent.
Other wise anxiety occurs cause of imbalance of certain neurotransmitters in the brain. especially serotonin, nor adrenaline, and dopamine to some extent. Medicines are the best options to take care of these symptoms. Paroxetine is the the most popular medicine and my drug of choice. I generally prescribe my patients 12.5 mg per day at night which takes care of anxiety symptoms. Also certain medicines like propranolol and clonazepam can be give as required when there is a panic episode or expected situation where panic attack can appear. Medicines are safe and can be considered as a good option.
Hope this helps,
In case if you have any further query, do let me know.