I'm a bit overwhelmed that you've all been so nice, thank you. It's made me a cry a bit again (but in a good way)
I was expecting to be told to that life's tough and not be so overdramatic.
nicenewdusters, the self pity Olympics did make me smile :)
springydaffs I've never thought about it but yes I think you've hit the nail on the head. My relationship with DM is very codependent.
She's had such a hard life and I have aways sacrificed my own time, health and money to try and give her as much happiness as possible.
I shouldn't of said about the punching. I used to self harm when I was younger and only when I am at rock bottom (and completely alone, when DD is somewhere else completely with DH or DMIL) I have a bad habit of punching myself a bit.
I know it's stupid and I think it goes back to being hit/seeing others hit by "D"F as a child.
I mustn't do it. I will try really hard not to do it again.
I'm currently coming off of antidepressants which I've been taking on and off for 10 years.
Unfortunately I started lowering the dose about two months before everything kicked off and I really don't want to go back to the high dose when I've come so far.
Marchate no I'm not claiming it as I've never thought that what I do for DM is being a carer to be honest.
MatildaTheCat yes you are completely right. DD is priority and comes before anyone and anything. I always make sure that she is happy and looked after and everyone else can be looked after second.
With regards to reducing the help I give to DM… I don't think I could.
She doesn't get any help,l or benefits and as it stands she's not (yet) a danger to herself as GP has assessed and she's able to go out by herself and probably could do the more psychical stuff too but I don't think it's fair on her to have to do that when she suffers from arthritis.
It's the mental and emotional side of looking after that has the biggest affect on me. Even if I go a day without seeing her I need to text and call her constantly because she needs constant reassurance that everything is ok.
She worries about everything.
Literally everything.
Someone sneezed when she was on the bus = many phone calls to persuade her she won't get flu
Her chocolate packet touched the floor = reassurance it's ok to eat.
She has, I want to say almost OCD like tendencies. She must catch the same time bus if she's going to town. She will eat the same food items every single day at the same time every day and will not even entertain the idea of eating anything different.
Sorry I'm babbling again. I guess what I'm trying to say is I feel sorry for her. She has a huge family and no one helps apart from me and I just couldn't see her suffer with her anxiety and not try and help her.
I will run myself into the ground if it means she and DD are both happy.
I have cut the babysitting right back I've only had him a few times on the past couple of months. I shouldn't of even moaned about that. They did have DD a bit when she was a baby and I honestly wouldn't expect them to take on a toddler when they're still getting used to having a baby themselves.
MIL is being looked at to see what's causing her problems. She has a huge heart and the last thing she wants is to cause me or DH any worry. She's suffering with anxiety and depression awfully at the moment and I feel awful that she comes round to look after DD when she's not well herself.
DH has a huge heart and really tries to help.
He can't do much with regards to DM apart from listen and support me but he wakes up every single morning with DD as he knows I don't get to sleep until the early hours of the morning (at best) we had marriage problems and came close to divorcing (lying and hiding things on his part) but he's seeing a councillor now and we're better than we were.
Sorry I've typed an essay again. 
I can't really say all this in real life to anyone and it's quite therapeutic just getting it out there.