Interview misery

I know I should be happy - I've finally got an interview, after several months of jobseeking and applications. However, I'm now feeling as though these are all just more torturous hurdles to try and make me go insane. The paperwork they expect me to bring along as per the new immigration rules consists of at least six documents, two of which to prove where I live (And I have no idea why they want that information - surely the fact I got the interview letter via the post says something?) and the rest to prove that I'm an actual real person. 

Actually getting to the interview feels like hell. It's being held in a place that's remote, and is a community centre as well as a health clinic - so dozens of triggers there for panic, not to mention the pre-interview nerves. 

I know I should be pathetically happy to be offered any job, but right now, it just feels like a slap in the face. I spent hours on the application form, redrafting the cover letter, and it won't even pay the rent after travel costs. I don't know how NT people do this and manage to cope, because I certainly don't feel that I'm coping myself. 

I've just recovered from a really bad migraine - migraines which will now have to be controlled for the rest of my life. My parents had to rescue me from my bedsit and give me specialist medication, and I really feel like I'm not coping. If I find even the interview hard, I'm going to be miserable for the rest of my life just trying to cope day-to-day.