No idea if this is the right topic, admin feel free to move it to whatever it goes into. It's about everything and I'm about to flip out. Couldn't even be bothered to NC. Sorry if this comes out as a rambling rant!
I have two dc 12 (learning disability, autism, adhd, sleep disorder) & 7 (type one diabetes). I'm disabled myself with ehlers danlos. This comes into the story.
I haven't had a break from parenting in five years.
I've been with my kids every. Single. Day. And night for 5 years straight.
I don't live near my folks, and even if I did they probably wouldn't have my kids because of dc7 disability and how dangerous it can be at night. (Day not so much because you're awake and can keep an eye!)
My in laws are as much good as a chocolate freaking tea pot.
I get dumped with DNephew to have overnight every single time they come to visit, they never offer to have my dc even before dc7 diagnosis even commented once "I couldn't look after them both."
Love DNephew, but I really don't want to have him overnight anymore when they visit it's to much. The people pleaser in me is always "oh it's nice for DC to have sleepovers!" 
MIL & FIL just add to daily stress and isn't something I really want to get into because we'll be here all day.
DH while he is helpful with DC, he does do insulin shots for dc7 and he'll help with dc12 meltdowns etc that's as far as help goes really!
I do all life admin. I drive him around because he won't learn to drive.
I do all housework despite using a walking stick to help me because one side of my body no longer works well. I even sort the bills (but he does work so that's something?)
I sort the kids when they have friends over. I take dc to events & my parents house so DH gets a lovely weeks break a few times a year when I take them away, he goes out once or twice a month with his friends while I get no break. Nothing. Nada.
How do I get a break with two disabled dc no one will happily watch them overnight for me because of the dangers. Nobody wants to be responsible. I've even looked into babysitters online and while I can find one for dc12 disabilities I can't find one who will happily look after a diabetic.
I feel like I'm going crack.
I'm so, so run down and tired with everything on top of a really soul destroying illness of own. I wake up with dislocations just from sleeping funny in my sleep. I can't even take pain medication because I need to be with it to look after my kids.
I'm constantly tired because of course I have to check my dc7 blood sugars through the night, or dc12 doesn't want to sleep.
It's just to much. Even if I asked DH to look after the kids for the night I have no friends because I don't have time for friends so that's not even an option.