Anxiety really is a bitch. I had it flare up and I became aware of it about this time last year, but in retrospect, its been something I've been dealing with, on and off, for years. Funny thing is, a few years ago I wouldn't have said I was a worrier.
Its a bitch tho... people don't really understand. The whole 'get over it' thing is all well and good for someone whos purely a little worried or nervous, but it doesn't do anything for full blown anxiety.
I've found my anxiety generally to be worry over things from the distant past. Really stupid irrational shit. However, my mother passed in April and since then I've developed bad health anxiety. Fear (mostly) of cancer consumes me some days. A pain here, a symptom there, and I've diagnosed myself and emulated scarios in my head where I'm terminal and have 6 months to live. Funnily enough, my mother didn't even die from cancer.
If I'm having a better day, lately its just a feel of general impending doom. Money worry. More family death. Girlfriend issues. Social issues. None of which are real. I just create scenarios where they become reality. It probably sounds daft to someone who doesn't suffer from it..