I Have Anxiety, Depression And Also Being A Hypocondriact

ok so i have anxiety/depression/also being a hypocondriact... i am constantly alert like increased alertness everyday i find hard to live with as i jus want to switch of... i mentally make myself sick i throw up that much and gagging untill i throw up bale i have to see a psychiatrist soon i just hate the mental alertness that the hospital told me last night when i was hospitalised that its because of anxiety i have had anxiety for many years but its only recently that when i come out of a mental state (depression they say) i have been alert about being in my own body it terrifys me cause i think i will be like this for the rest of my life and dont know if i can handle that i take zoloft and yaz i guess the only question i want to know is can someone die from a mental illness like what i have i just cant stop thinking about it i have insomnia and i think the worst of it and think i have fatal insomnia i am scared to death please help!!