I rather think you will ultimately get better ; and especially if you can work with a counsellor to develop a less alarmed and negative set of beliefs about yourself and your state. Allowing oneself to become consumed by gloomy assumptions, however they may seem to fit a series of unfortunate life experiences, can itself have a cumulatively negative impact on one's health.
Whatever physical health problems may have begun the process, and encouraged the initial gloom, such dispiriting problems almost inevitably make one sad, depressed and pessimistic. This, in turn, amplifies pain and other symptoms, and by causing muscle tensions, can cause further symptoms.
When one is experiencing intense fearful emotions, one's mind, trying to reduce and modify such unpleasant emotions, may, like an emotional fuse, lead to blackouts and other partial shut-downs. Blood pressure may rise on its own, but also in response to emotional tension and upset.
You mention serious anxiety, depression and panic, but in this message you mention a range of other drugs, but none properly capable of treating these significant conditions. In any case, though such meds, prescribed by a specialist psychiatrist, who would best be involved in re-assessing your whole story, making a careful fresh diagnosis, and considering which medicines might most help. Also, I don't see any way to help you competently, without also involving a skilled specialist clinical psychologist to engage you in proper formal psychotherapy / counselling, probably of the CBT form, to help you regain emotional control and able to contribute actively and effectively to regain control of your health.
You do, at the end of your question, though not what form of therapy they are using. The old-fashioned analytical style therapy is not widely considered truly helpful in situations such as you describe. Its unfortunate if, as you say, in some ways you grow more anxious at the thought that she might need to cancel a session : I hope you have told her this and discuss the issue. It is an important part of therapy to avoid letting the patient become dependent on sessions to the point of fear of missing one in itself becoming a cause of anxiety. One of the things I like about the CBT approach, is that one carefully avoids this, and teaches you ways of becoming more independent and confident. Do explore this with her.
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