There isn't a test which can conclude you don't have it, some forms have a specific genetic marker but the most common form doesn't. It certainly exists but I get what you're saying about it being hard to believe sometimes. I was treated for my first dislocation at age three days old. I'd hundreds more dislocations as a child which resulted in arthritis in my early forties. Only then did they think to diagnose me with anything. I spent my childhood contorting for everyone's amusement (family of eight kids) then they'd run off to play something energetic that I couldn't manage. There is the digestive problem too, which has me anaemic a lot of the time, again more so in childhood. The nerve damage is bad these days as well. So, yeah it exists but is very rarely diagnosed in the UK and Ireland, only very obvious cases like mine.
if not I’ll go down tomorrow afternoon.
. This means they have to rely on my memory 
I honestly think they think 40mg of er morphine is the stronger option. I'm going to have to go with it and complain of exessive sedation or something to try get back to dhc or perhaps something else.
sure you know what i mean.