OP, this is shocking. You poor girl, my heart breaks for you.
First of all, you're not here to serve anyone. Full stop.
One of your roles in life is to look after your children, which you do. This is also your husband's role which he is clearly trying to avoid and pin the full responsibility on you. That is not acceptable.
You have the right to work, whether this is part of your recovery or not.
He has a duty to respect that, which he doesn't. He's in the wrong, not you.
You cannot do anything that might hinder your recovery and affect your wellbeing.
Firstly because it's not good for YOU. Secondly because it won't be good for the children. You cannot and should not resign from your job if it makes you feel better.
To me it sounds like your husband is exercising a huge amount of control over you which is entirely unreasonable and unhealthy. I find your posts very worrying and I think you need to talk about this to your therapist, friends and family - if you have supportive people around you. He is bullying you into playing a certain role which is not good for you. It's coercion. I cannot comprehend how a husband can be so selfish and dismissive of his wife's needs, especially if you were unwell and are now recovering, that is truly astonishing.
His behaviour is completely unacceptable. He's manipulating you to believe that he has the "right" to two days off, to go on holiday on his own, whereas you cannot have a career or even a break from home duties? That's just leaving me speechless! It's completely wrong!
Honestly, if that was my husband, I'd divorce him without a second thought, but I appreciate you might not be ready at this time.
You sound very vulnerable and you need to talk to a professional and people close to you. Thank you for opening up to us as a first step!
Secondly, do not give up on yourself. Do not quit your job.
Wishing you lots of strength and I hope you'll have the support you need from others to stay on the right path which I can tell you recognise deep inside. Please stick to it ❤️