Diagnosed with psoriatic arthritis a year ago; in a lot of pain and v fatigued (sleeping at lunchtime every day and still exhausted), waiting to start yet another medication after the other three didn't help. Applied for PIP a couple of months ago, not heard anything til getting a letter asking me to come for an interview in about ten days time. Panicking a bit - kids and DP say I'm too stoic - and not sure what to expect. Visions of getting flustered and contradicting myself. Has anyone else who's had the same tell me what to expect at interview, please? Thanks 