I was in a psych unit for six months trying to convince them that yes, whilst I did acknowledge I had a mental health condition, that wasn't what had caused me to be bed bound for months.
I think especially if you have an invisible health condition (I have a selection!), then being taken seriously is a nightmare. Once, however, that first barrier is broken down, it tends to get easier to be taken seriously. Doesn't make it early stages any easier though.
Also understand what its like to speak to someone and suddenly go "Fuck... This is my life". I'm 21, so most of my friends have either completed their degrees or are in their final year at uni, and sometimes just seeing their facebook updates makes me want to scream.
I promise you though that the days when you feel like this get less frequent. I still have times where I just want to cry because its all so fucking unfair. But now, five and a half years in to being so ill, I've accepted it. And once you accept it, all the energy that you put in to fighting it you can employ into finding the good that you still have in your life. I know that's so hard to hear when you're in a bad place. And I know you don't want to accept this as being your life, because, really, who would? Tonight I'm having a very low night, and that's okay. I'm accepting I'm low, and that the reasons for that are very rational; I'm sick of being in pain, and sick of having to consider my mobility so much when I should be more concerned with which club I fancy going to this week. The real break through with how down my illnesses got me was when I accepted them.
Do know how you're feeling. And can relate to all your experiences with the medical teams as well. And its a pile of steaming crap. But it does get easier. Promise.