I feel exactly the same way, for the past two weeks I've been feeling on edge and have had several panic attacks. I Think to myself, I'm not living like this for the rest of my life...maybe it would be better if i ended it.
I keep convincing myself that something else is wrong with me apart from the anxiety, if i get a pain in my stomach, I think i have stomach cancer, if I get a migraine due to the anxiety, I think I have a brain tumor. Sounds stupid I know, but in the moment you really convince yourself.
Also, for the past week I've been feeling depressed and not myself, this plus the panic attacks just make life seem unbearable. I'm usually a happy person and have never had these thoughts before.