Well done!!!
You are strong
I can see very clearly that you don’t think of yourself as strong, or having any power, or being in charge of your own life, but you are ALL of those things!
You need to stop running yourself down all the time, the language you use about yourself is really negative, and I bet that’s how you think in your head all the time too?
You doubt yourself all the time, call yourself weak, or say you think your ideas or actions are stupid or weak or you know it looks pointless etc etc etc. You don’t believe in yourself very much, but you’ve done lots of really tough and amazing things. And I think you need to stop being so hard on yourself. Tell yourself that you’re doing well for a change! That you’re proud of yourself! That you’re a good person and a good mum. And that you’re too good for such a man as your ex, who sees you as a weak and vulnerable mark he can bully and dominate... or, he used to see you as that, he’s had rather a shock as you’re showing him you are so much more than his small judgement of you!
As I know you’re aware, that means he could be trouble for the next couple of weeks, as he tries to get you back under his control. But if you stay strong and don’t give him an ‘in’, he’ll get bored and toddle off to someone else easier to get stuff out of.
Then you are free to concentrate on getting your head back on straight

Living with, or just being with someone who is just using you and abusing you all the time, well it drains you of self esteem and confidence. So you lose any sense of loving yourself at all, and a strong sense of belief that you can cope well with life. Really, you lose your sense of direction, your inner compass, because you become so focused on the abuser.
By the way, about your disability - do you still need help? Do you need a carer? I got stuck with my abusive husband when I became suddenly disabled because I had to rely on him to help me. I found children’s services completely awful in that respect, they failed to understand the situation and even when I explained that I was relying on him to help me wash etc, they just told me breezily that I’d cope if I really wanted to and everyone used excuses like that!!! They then also threatened to take my ds into care if they heard another report of violence from this house again, effectively cutting off any ability for me to get help if he hurt me again. And that was it! They completely failed to mention that there was help available from adult social services and they could help with carers so I didn’t have to rely on a horribly abusive man to give ‘care’ (when and if he felt like it)... I discovered this many months later, and it was the main thing that enabled me to get away from my abuser.
So, what I’m trying to say is that ss don’t always give you the right information, and that if you are still physically struggling, you may be able to get help via adult social services.